REFERENCE SPECIMENHistorical catalogue reference
Quartz
SiO₂
Silica, glass & industrial applications
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MADAGASCAR GEOLOGICAL CONTEXT · NOT A PHOTO OF THIS MATERIAL
Reference photograph · not deposit evidence. Diorit · CC BY-SA 3.0 · Wikimedia Commons
- Research family
- Industrial minerals
- Reference chemistry
- CaSO₄·2H₂O
- Crystal system
- Monoclinic
- Malagasy provenance
- Historical reference
01 / Technical dossier
The material. The evidence.
Reference properties and the analytical work needed to assess this material for industrial use.
TO-REF-GYPSUM
Revision 1.0 · Technical reference
Material identity
CaSO₄·2H₂O
Hydrated calcium sulfate. Distinguish gypsum from anhydrite and other sulfate phases.
- Mohs hardness · reference species
- 1.5–2
- Crystal system
- Monoclinic
Handbook of Mineralogy · Gypsum · Gypsum. Mineral identification constants, not bulk product test results.
Historical catalogue reference
Listed in historical national mineral reporting. This does not establish current production, economic reserves, ownership or commercial availability.
Laboratory characterisation
Parameters to establish on a representative sample. Methods below are analytical routes, not a certified test protocol. No lot-specific result or acceptance limit has been supplied.
| Parameter / reporting unit | Analytical route | Result |
|---|---|---|
| Mineral phases and proportionsphase identification / % | X-ray diffraction (XRD); quantify with a validated method | Not supplied |
| CaO / SO₃% dry mass | Validated XRF or digestion + ICP-OES / ICP-MS; matrix-specific preparation | Not supplied |
| Combined water / free moisture%; separately reported | Validated thermal / gravimetric methods distinguishing water fractions | Not supplied |
| Particle-size distribution (d10 / d50 / d90)µm | Sieving or laser diffraction; report dispersion conditions | Not supplied |
Traceability & certification
- Sample ID & collection date
- Not supplied
- Locality & supplier provenance
- Not supplied
- Sampling protocol & representativeness
- Not supplied
- Laboratory & accreditation scope
- Not supplied
- Certificate of analysis (CoA)
- Not supplied
- Product form, packaging & shelf life
- Not supplied
Handling & safety
Control dust during handling. A material-specific safety data sheet (SDS), exposure assessment and transport classification are required before shipment.
Reference basis
USGS · The Mineral Industry of Madagascar, 2019 (published 2024)
Mineralogical Society of America · Handbook of Mineralogy
Mineral identity and ideal chemical formulas; not Madagascar sample analyses.
Reference sheet only, not a certified product TDS, safety data sheet or certificate of analysis. No purity, grade, origin or supply commitment is certified.
02 / Continue your research
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