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Crystalis Crystal Dictionary

Boji Stone

The Polarity Balancer

You have split yourself into opposite functions and forgotten they belong to one life. Boji stones form as iron-rich concretions in male and female pairs, rough and rounded, magnetic in their own folklore and dense in the hand. Balance is easier when you stop pretending your halves are strangers.

Intent

Protection & Grounding
Mind-Body ConnectionEmotional BalanceVitality & Desire
Add to journalFind pairingsTake Sacred Match
Somatic note

In the palms and lower abdomen, Boji stone is used as a weight-based cue for bilateral organization. Boji Stone is handled in body-based work through its physical...

The Meaning

Boji Stone in the Crystalis dictionary

Division can become habit. One hand reaches for one version of the self, the other for something opposite, and neither one trusts the bridge.

Boji stones are iron sulfide concretions, rounded nodules with different surface expressions that folklore later organized into paired use. Even before the story, the object already suggested duality in contact: rough and smooth, left and right, weight meeting weight.

Some balance comes back the moment both hands admit they are holding one life.

Stone Lore

Stories carried through time

Cultural notes are presented as tradition and historical context — stories carried through time.

Unknown

From an Ancient Seaway to a Trademarked Name

Boji stones are far older than the name they carry. The concretions formed in the Late Cretaceous, roughly 85 million years ago, within the sediments of the Western Interior Seaway. Native American peoples of the Great Plains likely encountered them in erosional exposures in the pre-contact era, though specific ethnographic documentation is sparse. In the 1970s and 1980s, Karen Gillespie trademarked the name "Boji Stone" and popularized the stones in the metaphysical crystal market as paired "male and female" stones.

They have been widely adopted in crystal healing communities since the 1990s, and the trademark has created legal distinctions between "Boji Stones" and the generic "Kansas Pop Rocks."

Lore & history

Trade Name Origins

"Boji" was coined by Karen Gillespie as a proprietary trade name. The more descriptive term "Kansas Pop Rocks" refers to their geographic origin and the tendency of pyrite concretions to fracture or "pop" when heated. The scientific...

Unknown

Historical note

Cultural Traditions

No well-documented ancient ceremonial use specific to these concretions. Their metaphysical popularity is entirely modern (post-1970s). Some sellers draw loose parallels to Moqui Marbles, which have documented cultural significance to some...

Unknown

Earth Record

Mineralogy and formation

Inside marine sediment long after deposition, iron and sulfur can reorganize into dense sulfide nodules that grow around a quiet center. These concretions developed in marine sediment where reducing conditions allowed iron sulfides to precipitate around a nucleus, often with later weathering altering the exterior to brown oxides. The trade name refers to material collected in Kansas and commonly described as a combination of pyrite and marcasite, two FeS₂ polymorphs with cubic and orthorhombic internal ordering.

The concretion itself is not a single crystal. It is a polycrystalline aggregate shaped by accretion, compaction, and replacement.

That distinction matters when the specimen is read correctly. Boji stones are geological objects formed by sedimentary chemistry, not a tidy mineral species with one crystal system and one textbook habit. Some show smoother rounded surfaces, others rough projections where crystal growth expressed itself unevenly through the rind. Collectors often name these forms as female and male, but the actual explanation sits in varying texture, oxidation, and exposure of sulfide surfaces.

Because pyrite is denser than quartz and much heavier than most stones of similar size, the body recognizes the weight immediately.

Cretaceous sediment, sulfide nucleation, and later weathering gave these stones their blunt authority. They feel like paired functions rather than polished beauty. The closing somatic note follows that mood: balance becomes easier when the system stops treating its opposite tendencies as strangers and lets both weight and roughness share one hand.

The mineral data reinforces that formation story. Boji Stone carries the chemistry Primary iron sulfide component: FeS2 (pyrite, isometric; marcasite, orthorhombic). Matrix: CaCO3 (calcite/chalk) with minor clay minerals and limonite (FeOOH) weathering rinds. , and the stated crystal system is Pyrite Component Is Isometric (Cubic); Marcasite Component Is Orthorhombic. The Concretions Themselves Are Amorphous/Polycrystalline Aggregates With No Single Crystal System..

Hardness around 6 and specific gravity of 4. 8-5. 0 (pure pyrite); overall concretions approximately 3. 5-4. 5 due to chalk matrix are not decorative catalog facts. They describe how tightly the structure holds together, how the crystal responds to abrasion, and how much weight the hand expects from a piece of that size. Luster, color, and origin also preserve clues to environment. Brown material from USA (Kansas) reaches the market with a visual identity shaped by local geology, not by a generic stone category.

A specimen therefore carries process in several layers at once: chemistry, symmetry, growth history, and later alteration or treatment where relevant. What emerges from that stack is a stone that can be read physically before any symbolic meaning is assigned.

Pyrite Component Is Isometric (Cubic); Marcasite Component Is Orthorhombic. The Concretions Themselves Are Amorphous/Polycrystalline Aggregates With No Single Crystal System. structure

Chemical Formula
Primary iron sulfide component: FeS2 (pyrite, isometric; marcasite, orthorhombic). Matrix: CaCO3 (calcite/chalk) with minor clay minerals and limonite (FeOOH) weathering rinds.
Crystal System
Pyrite Component Is Isometric (Cubic); Marcasite Component Is Orthorhombic. The Concretions Themselves Are Amorphous/Polycrystalline Aggregates With No Single Crystal System.
Mohs Hardness
6
Specific Gravity
4.8-5.0 (pure pyrite); overall concretions approximately 3.5-4.5 due to chalk matrix
Luster
Metallic to sub-metallic on fresh pyrite surfaces; earthy to dull on weathered surfaces
Color
Brown
IMA Status
trade_name
IMA Number
pre-IMA
01

Mineral conditions gather

02

Structure begins to crystallize

03

Boji Stone records place and pressure

Smoky Hill Chalk, western Kansas, USA (type locality . Stanton County and surrounding areas in the Niobrara Formation) Note: "Boji Stone" is a trademarked name; similar iron-sulfide concretions occur in Cretaceous chalks worldwide but are not "Boji Stones" by trade definition Moqui Marbles (iron oxide concretions from Navajo Sandstone, Utah) are sometimes confused with Boji Stones but are geologically distinct, those are iron-oxide cemented sandstone concretions, not iron-sulfide concretions

Boji Stones are iron-sulfide concretions that formed within the Smoky Hill Chalk Member of the Niobrara Formation in western Kansas, a Late Cretaceous (approximately 87-82 million years ago) marine chalk deposited in the Western Interior Seaway. The Niobrara Formation represents a period of extensive pelagic carbonate deposition across the interior of North America, when warm, shallow seas covered much of the continent.

Neonatal mosasaur fossils and other marine reptile remains recovered from these deposits confirm the fully marine, pelagic setting of this chalk unit (Field et al. , 2015, DOI: 10. 1111/pala. 12165).

USA (Kansas)

Telling it apart

Dealers routinely lean on folklore labels with Boji stone, and that invites confusion between trademarked Kansas concretions and ordinary pyrite nodules. The confirming step is surface habit and provenance. Sellers can lean on color, trade names, or locality mythology, but that one check separates the real material from the easy substitute. Boji Stone has its own physical signature in the hand and under magnification, whether that means unusual density, a true internal growth pattern, a natural host matrix, or evidence of locality and structure.

Fraud or simple sloppiness matters differently here than it would for a generic tumbled stone. Trademark claims and pairing folklore affect price, so Kansas locality and authentic iron sulfide concretion texture protect the purchase. A buyer paying for Boji Stone is paying for a specific geological story, not just a similar color. Without confirmed mineral identity, the buyer is purchasing a marketing name, not a geological specimen.

Spotting the real thing

Boji stones (trademarked name): iron sulfide concretions from Kansas. Some smooth, some textured with protruding pyrite/marcasite crystals. Specific gravity approximately 3.

5-4. 5. Metallic to sub-metallic luster on fresh surfaces.

The trade name is trademarked; similar concretions from other localities may be called by different names but are mineralogically equivalent.

Cross-referenceMindat ↗

Energetic Associations

How people most often work with Boji Stone

Protection & Grounding

Used as a reminder to keep boundaries clear while staying present in the body.

Mind-Body Connection

A traditional association that gives Boji Stone a clear intention pathway in practice.

Emotional Balance

A traditional association that gives Boji Stone a clear intention pathway in practice.

Vitality & Desire

A traditional association that gives Boji Stone a clear intention pathway in practice.

Primary pathway: Protection & Boundaries

Energy & VitalityHeart HealingProtection

Charged & on alert

- Active sympathetic hyperarousal (fight/flight)

Suggested Placement: - One in each palm (traditional paired use) for bilateral grounding - Soles of feet for downward grounding - Base of spine / sacrum area

These associations come from tradition and reflective practice — a way of working with the stone, not a medical prescription.

Somatic Practice

Simple ways to work with Boji Stone

Hold

Carry Boji Stone in a pocket or place it over the heart center during a pause.

Meditate

Let the stone become a quiet tactile anchor while the breath slows.

Breathe

Breathe in softness. Breathe out tension. Keep the practice simple.

Journal

Write with Boji Stone nearby to name the feeling without forcing a conclusion.

Bodywork

Rest the stone near the chest, hand, or bedside as a reminder to soften.

Environment

Place it where you want a visual cue for care, repair, or steadiness.

Field Instruction

The Paired Stone Witness

Honor the paired stones you cannot touch.

3 min protocol
  1. 1

    Place the Boji Stones in a sealed glass display case or behind glass. Do NOT handle with bare hands — these iron sulfide concretions can decompose and release sulfuric compounds that irritate skin. Sit 2-3 feet away. Settle your posture. Let your breath slow.

  2. 2

    Observe the rounded, dark brown to black forms. Notice the smooth and rough textures of the pair, the contrast between them. Let your eyes soften. Your body does not need to touch these stones to receive their signal — the visual field is enough.

  3. 3

    With each exhale, release one thing — a thought, a tension, a worry. The stones hold their own boundaries. You hold yours. Continue breathing. Notice where the body softens first.

  4. 4

    After 3 minutes: check in. Has the breath changed? Has the jaw released? That shift — however small — is the protocol complete. The pair witnessed. The body responded. No contact required.

Stone Intelligence

The fact that makes Boji Stone memorable

Iron sulfide concretions from Kansas. Pyrite and marcasite precipitated around nucleation points in sedimentary rock. Some smooth, some textured.

The science documents concretionary growth. The practice asks what grounding feels like when it comes in pairs.

SCI

Pelagic neonatal fossils support viviparity and precocial life history of <scp>C</scp>retaceous mosasaurs

Palaeontology · 2015Read source

SCI

Respiratory health and silicosis in artisanal mine workers in southern Brazil

American Journal of Industrial Medicine · 2021Read source

SCI

A comparative DFT study of Fe <sup>3+</sup> and Fe <sup>2+</sup> ions adsorption on (100) and (110) surfaces of pyrite: An electrochemical point of view

Surface and Interface Analysis · 2019Read source

SCI

Precipitation patterns formed by self-organizing processes in porous media

Geofluids · 2011Read source

Ritual Use

From reference to practice

Boji Stone in ritual practice

Polyvagal Framework: Boji Stones, as iron-sulfide concretions with notable heft and magnetic/electrical properties (pyrite is semiconducting), address the dorsal vagal (shutdown/freeze) state. Their density and weight provide strong proprioceptive grounding input. The tradition of using them in pairs (one in each hand) creates bilateral stimulation that can help re-engage the ventral vagal social engagement system from a collapsed dorsal vagal state.

When to Use: - Freeze/dissociation states where the person feels "unreal" or disconnected from body - Grounding after overwhelming emotional flooding - When needing to feel "held" or weighted (the density provides somatic anchoring) - For bilateral engagement (paired stones, one per hand)

When NOT to Use: - Active sympathetic hyperarousal (fight/flight). the stimulating electrical properties may intensify agitation - If the person is already over-grounded/rigid/constricted - Not suitable for highly anxious states where stillness is difficult

Suggested Placement: - One in each palm (traditional paired use) for bilateral grounding - Soles of feet for downward grounding - Base of spine / sacrum area

Temperature Properties: Iron-sulfide concretions feel cool to the touch due to high thermal conductivity of the metallic sulfide component. They warm relatively slowly against the body. The cooling sensation provides an additional sensory anchor.

Sacred Match

Sacred Match reaches for Boji Stone when what you feel sounds like:

  • split attention between left and right
  • heavy legs with an agitated chest
  • fidgeting that does not relieve pressure
  • difficulty sensing the floor
  • fatigue after prolonged vigilance

Sacred Match listens to the body rather than to preference. It notices what you are feeling right now, the way you are protecting yourself, and the deeper need underneath both. When that points to a pattern answered by boji stone, the prescription follows the stone’s physical behavior. Its geology, texture, density, optical structure, and handling profile indicate whether the body needs ballast, clearer edges, reduced visual noise, or a more organized field of attention.

The match is made when the material solves for the body’s immediate regulation problem better than a prettier or more famous alternative.

split attention between left and right -> body asking for orientation -> seeking a clear point of contact

heavy legs with an agitated chest -> protective tension rising -> seeking containment

fidgeting that does not relieve pressure -> signal overload in the tissues -> seeking organization

difficulty sensing the floor -> regulation failing at the threshold -> seeking a gentler entry

fatigue after prolonged vigilance -> action or rest cannot complete -> seeking coherence

Take Sacred Match

Pairings Recipe File

Stones and herbs that harmonize with Boji Stone

Crystalis crystal and herb pairing recipe box
Pairings are treated like a recipe file: clear use, method, and safety.

Crystal Companion

Boji Stone + Amethyst

Use when
You want to layer the primary intention with another supportive tone.
How to work with it
Place the stones together during meditation, journaling, or a short reset.
Safety
Use as a reflective practice tool, not as a medical substitute.

Crystal Companion

Boji Stone + Rhodonite

Use when
You want to layer the primary intention with another supportive tone.
How to work with it
Place the stones together during meditation, journaling, or a short reset.
Safety
Use as a reflective practice tool, not as a medical substitute.

Crystal Companion

Boji Stone + Clear Quartz

Use when
You want to layer the primary intention with another supportive tone.
How to work with it
Place the stones together during meditation, journaling, or a short reset.
Safety
Use as a reflective practice tool, not as a medical substitute.

Crystal Companion

Boji Stone + Black Tourmaline

Use when
You want to layer the primary intention with another supportive tone.
How to work with it
Place the stones together during meditation, journaling, or a short reset.
Safety
Use as a reflective practice tool, not as a medical substitute.

Hematite: Dense bilateral grounding. Boji stone already carries notable weight; hematite intensifies the sense of mass and lowers scattered attention into the legs. It is best when the body feels split between overdrive and collapse. Hold one stone in each palm while both feet stay flat on the floor.

Black Tourmaline: Boundary plus ballast. Tourmaline defines the perimeter and Boji stone adds inward compression. That sequence helps a practice feel contained rather than merely heavy. Place black tourmaline by the feet and Boji stone pair in the hands.

Smoky Quartz: Slow discharge after strain. Smoky quartz works well when the person has accumulated pressure and needs a downward route for it. Boji stone makes that route feel tactile and immediate. Set smoky quartz at the base of the spine and Boji stones at either side of the hips.

Red Jasper: Steady movement after immobilization. Red jasper adds warmth and continuity to Boji stone’s denser stop-start quality. The combination suits fatigue after prolonged vigilance. Carry red jasper in the left pocket and Boji stone in the right pocket.

Taken together, these combinations work best when the stones are kept in distinct roles instead of piled into one indiscriminate cluster. One sets the frame, one changes the tone, and one gives the body a placement cue it can actually follow.

Care & Cleansing

How to keep Boji Stone in good condition

Water Safe?

Keep dry

This stone should stay out of water. Water can dull the surface, destabilize the specimen, or damage the stone over time.

Sunlight Safe?

Sunlight safe

Tolerates daylight; safe to charge or display in the sun.

Authenticity

What to check

Natural Boji Stone should usually feel cooler than plastic or resin on first touch and warm more slowly in the hand.

Water: NO. Do not immerse in water. Iron sulfides react with water and oxygen to produce iron hydroxide (rust) and sulfuric acid. Prolonged water contact will degrade the specimen and contaminate the water with dissolved iron and sulfate. Indirect water method only. Sun: Generally stable in sunlight. However, prolonged UV exposure may accelerate surface oxidation of pyrite to limonite.

Best kept out of sustained direct sun to preserve metallic luster. Toxicity: - MODERATE CAUTION: Pyrite (FeS2) can produce sulfuric acid when exposed to moisture and air over time (acid generation through oxidative weathering). This is the same process responsible for acid mine drainage. Prolonged water exposure can release dissolved iron and sulfate, and in some cases trace metals (Chen et al.

, 2013, DOI: 10. 1111/1462-2920. 12114). Dust from cutting or grinding pyrite/marcasite is irritating to lungs. Crystalline silica (if present in matrix) poses a respiratory hazard if inhaled as dust (Stacey et al. , 2021, DOI: 10. 1002/jrs. 6110). Marcasite is less chemically stable than pyrite and may decompose over time, producing sulfur odors and acidic surface residues. Handling: Wash hands after handling, particularly rough or freshly broken specimens.

The metallic sulfide dust can contain trace amounts of heavy metals. Do not use in gem elixirs or water infusions under any circumstances.

Temperature

Natural Boji Stone should usually feel cooler than plastic or resin on first touch and warm more slowly in the hand.

Scratch logic

Use 6 on the Mohs scale as the check, not internet myths. A real specimen should behave in line with the hardness listed above.

Surface and luster

Look for a metallic to sub-metallic on fresh pyrite surfaces; earthy to dull on weathered surfaces surface quality rather than a painted or plastic shine.

Weight and density

The listed specific gravity is 4.8-5.0 (pure pyrite); overall concretions approximately 3.5-4.5 due to chalk matrix. If a specimen feels unusually light for its size, it may deserve a second look.

My Field Guide

Your private record and next steps

Crystalis field notebook with botanical sketches and rose quartz

Journal

Add this stone to your private collection, then log what happened when you worked with it.

Shared Notes

Read public practice logs and pattern notes from the Crystalis community.

Open shared notes

Sacred Match

Find crystal, herb, and intention pairings that resonate with your season.

Find your match

Shop Boji Stone

Explore intentionally selected pieces for ritual, emotional repair, and self-love work.

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Community field notes

No shared notes under Boji Stone yet.

When members save a public field note for this stone, it will appear here.

Frequently Asked

Questions people ask about Boji Stone

What is Boji Stone?

Boji stone is not a single mineral species but a sulfide concretion: a concretionary aggregate of iron sulfide minerals, pyrite and marcasite (both FeS2; pyrite isometric, marcasite orthorhombic), within a sedimentary calcite/chalk matrix (CaCO3) carrying minor clay minerals and limonite (FeOOH) weathering rinds. The pyrite component is Mohs 6 to 6. 5, and the overall concretion runs approximately 5 to 6.

5 depending on the degree of weathering and matrix composition. The concretions themselves are amorphous, polycrystalline aggregates with no single crystal system.

What is the Mohs hardness of Boji Stone?

Boji Stone has a Mohs hardness of 6-6.5 (pyrite component); overall concretion approximately 5-6.5 depending on degree of weathering and matrix composition.

Can Boji Stone go in water?

NO; Do not immerse in water. Iron sulfides react with water and oxygen to produce iron hydroxide (rust) and sulfuric acid. Prolonged water contact will degrade the specimen and contaminate the water with dissolved iron and sulfate. Indirect water method only.

Can Boji Stone go in the sun?

Generally stable in sunlight. However, prolonged UV exposure may accelerate surface oxidation of pyrite to limonite. Best kept out of sustained direct sun to preserve metallic luster.

What crystal system is Boji Stone?

Boji Stone crystallizes in the Pyrite component is isometric (cubic); marcasite component is orthorhombic. The concretions themselves are amorphous/polycrystalline aggregates with no single crystal system.

What is the chemical formula of Boji Stone?

The chemical formula of Boji Stone is Primary iron sulfide component: FeS2 (pyrite, isometric; marcasite, orthorhombic). Matrix: CaCO3 (calcite/chalk) with minor clay minerals and limonite (FeOOH) weathering rinds.

Where is Boji Stone found?

- Smoky Hill Chalk, western Kansas, USA (type locality, Stanton County and surrounding areas in the Niobrara Formation) - Note: "Boji Stone" is a trademarked name; similar iron-sulfide concretions occur in Cretaceous chalks worldwide but are not "Boji Stones" by trade definition - Moqui Marbles (iron oxide concretions from Navajo Sandstone, Utah) are sometimes confused with Boji Stones but are geologically distinct, those are iron-oxide cemented sandstone concretions, not iron-sulfide concretions.

Is Boji Stone toxic?

- MODERATE CAUTION: Pyrite (FeS2) can produce sulfuric acid when exposed to moisture and air over time (acid generation through oxidative weathering). This is the same process responsible for acid mine drainage. Prolonged water exposure can release dissolved iron and sulfate, and in some cases trace metals (Chen et al., 2013, DOI: 10.1111/1462-2920.12114).

Sources & Citations

Where this entry can be checked

Crystalis source notebook and citation desk

Back Matter

Readable for people. Structured for AI search.

Sources stay visible in the page so readers, search engines, and answer systems can follow the evidence trail.
  1. 01

    SCI

    Pelagic neonatal fossils support viviparity and precocial life history of <scp>C</scp>retaceous mosasaurs

    Field, Daniel J., LeBlanc, Aaron, Gau, Adrienne, Behlke, Adam D. (2015). Pelagic neonatal fossils support viviparity and precocial life history of <scp>C</scp>retaceous mosasaurs. Palaeontology. [SCI]DOI 10.1111/pala.12165
  2. 02

    SCI

    Respiratory health and silicosis in artisanal mine workers in southern Brazil

    Souza, Tamires P., van Tongeren, Martie, Monteiro, Inês. (2021). Respiratory health and silicosis in artisanal mine workers in southern Brazil. American Journal of Industrial Medicine. [SCI]DOI 10.1002/ajim.23242
  3. 03

    SCI

    A comparative DFT study of Fe <sup>3+</sup> and Fe <sup>2+</sup> ions adsorption on (100) and (110) surfaces of pyrite: An electrochemical point of view

    Nourmohamadi, Hossein, Aghazadeh, Valeh, Esrafili, Mehdi D. (2019). A comparative DFT study of Fe <sup>3+</sup> and Fe <sup>2+</sup> ions adsorption on (100) and (110) surfaces of pyrite: An electrochemical point of view. Surface and Interface Analysis. [SCI]DOI 10.1002/sia.6728
  4. 04

    SCI

    Precipitation patterns formed by self-organizing processes in porous media

    BARGE, L. M., HAMMOND, D. E., CHAN, M. A., POTTER, S., PETRUSKA, J. et al. (2011). Precipitation patterns formed by self-organizing processes in porous media. Geofluids. [SCI]DOI 10.1111/j.1468-8123.2010.00324.x
  5. 05

    SCI

    Diagenesis, compaction strain and deformation associated with chert and carbonate concretions in organic‐rich marl and phosphorite; Upper Cretaceous to Eocene, Jordan

    Abu‐Mahfouz, Israa S., Cartwright, Joe A., Powell, John H., Abu‐Mahfouz, Mohammad S., Podlaha, Olaf G. (2023). Diagenesis, compaction strain and deformation associated with chert and carbonate concretions in organic‐rich marl and phosphorite; Upper Cretaceous to Eocene, Jordan. Sedimentology. [SCI]DOI 10.1111/sed.13085
  6. 06

    SCI

    Formation of large carbonate concretions in black cherts in the Gufeng Formation (Guadalupian) at Enshi, South China

    Wei, Hengye, Tang, Zhanwen, Qiu, Zhen, Yan, Detian, Bai, Maquzong. (2019). Formation of large carbonate concretions in black cherts in the Gufeng Formation (Guadalupian) at Enshi, South China. Geobiology. [SCI]DOI 10.1111/gbi.12362
  7. 07

    SCI

    A high‐resolution chemical and structural study of framboidal pyrite formed within a low‐temperature bacterial biofilm

    MACLEAN, L. C. W., TYLISZCZAK, T., GILBERT, P. U. P. A., ZHOU, D., PRAY, T. J. et al. (2008). A high‐resolution chemical and structural study of framboidal pyrite formed within a low‐temperature bacterial biofilm. Geobiology. [SCI]DOI 10.1111/j.1472-4669.2008.00174.x
  8. 08

    SCI

    Shifts in microbial community composition and function in the acidification of a lead/zinc mine tailings

    Chen, Lin‐xing, Li, Jin‐tian, Chen, Ya‐ting, Huang, Li‐nan, Hua, Zheng‐shuang et al. (2013). Shifts in microbial community composition and function in the acidification of a lead/zinc mine tailings. Environmental Microbiology. [SCI]DOI 10.1111/1462-2920.12114
  9. 09

    SCI

    Raman spectroscopy and X‐ray diffraction responses when measuring health‐related micrometre and nanometre particle size fractions of crystalline quartz and the measurement of quartz in dust samples from the cutting and polishing of natural and artificial stones

    Stacey, Peter, Hall, Samantha, Stagg, Stephen, Clegg, Francis, Sammon, Christopher. (2021). Raman spectroscopy and X‐ray diffraction responses when measuring health‐related micrometre and nanometre particle size fractions of crystalline quartz and the measurement of quartz in dust samples from the cutting and polishing of natural and artificial stones. Journal of Raman Spectroscopy. [SCI]DOI 10.1002/jrs.6110