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Soft and colorful minerals

Gypsum

Selenite and satin spar trade forms

Common trade names
  • Selenite
  • Satin Spar (different habits)

Gypsum is selenite and satin spar trade forms. Learn its identifying features, lookalikes, recognized sources, care, treatments, and responsible modern associations.

Gypsum shown as a polished palm-stone or cabochon form beside a rough form in a generated educational comparison illustration
Generated comparison illustration Polished and rough forms are standardized for visual learning; the illustration is not proof of authenticity or geographic origin.

Material identity

At a glance

Identity
Mineral species
Composition
CaSO4.2H2O
Mohs hardness
2
Crystal form or structure
Monoclinic
Recognized sources
Mexico / Morocco / Spain / United States - notable collector sources

Recognized sources provide geographic and market context. Appearance alone cannot establish the origin of an individual specimen.

Beginner identification

How to identify Gypsum

Colorless plates, transparent crystals, or white fibrous satin spar with silky sheen.

Real material comparison

Reference gallery

Use these credited photographs to compare natural variation. No photograph can authenticate an unknown specimen by itself.

Gypsum real specimen reference photograph
Exact Material Reference S125 Wikipedia Loves Art participant " Assignment_Houston_One " CC BY-SA 2.5 View image source
Gypsum real specimen reference photograph
Exact Material Reference S126 Robert M. Lavinsky CC BY-SA 3.0 View image source

Lookalikes

Commonly confused with

Calcite, barite, glass, synthetic fiber bundles.

Market context

Treatments and imitations

Dye, coating, glued towers, and misuse of selenite for satin spar are common.

Observation guide

What to check

A fingernail can scratch gypsum, but do not test a saleable object. Inspect fibers and glue.

Use visual checks to ask better questions, not to replace qualified testing when identity, treatment, value, or origin is consequential.

Practical handling

Care and safety

Keep dry. Do not soak, steam, ultrasonically clean, or expose to heat.

Responsible buying

Ethics and sourcing

Satin spar is a gypsum variety, not a separate species. Use accurate naming and control cutting dust.

The material story

A short story about Gypsum

Gypsum supports plaster, wallboard, cement, and agriculture, making it a major industrial mineral.

Symbolic and cultural context

Meaning and modern practice

Modern KREATEUR interpretation

Use transparency and softness as reminders that not every useful tool must be forceful.

Primary current LENS — Clarity, study, focus

Secondary currents VOICE

Common intentions

  • clarity
  • focus
  • study
  • memory
  • decision-making
Use with agency

Metaphysical associations are reflective and symbolic. Crystals do not guarantee healing, protection, love, money, diagnosis, safety, or spiritual contact and do not replace professional medical, mental-health, legal, safety, or financial support.

Evidence and accountability

Sources and review

  1. IMA Database of Mineral Properties — International Mineralogical Association

    Official context for accepted mineral names, formulas, status, and the IMA mineral database.

  2. GIA Gem Treatments — Gemological Institute of America

    Treatment vocabulary, disclosure, and market relevance.

  3. Mindat — Hudson Institute of Mineralogy

    Mineral identity, localities, habits, associations, and documented specimen context.

  4. CIBJO Blue Books — World Jewellery Confederation

    Trade terminology, treatment language, and disclosure frameworks.

  5. Wikimedia Commons file records — Wikimedia Foundation and individual contributors

    Image provenance, authorship, license terms, and source-file records.

  6. National Minerals Information Center — United States Geological Survey

    Mineral production, industrial use, supply, and economic context.

Factual claims are checked against claim-relevant reputable sources such as GIA, geological surveys, museums, standards bodies, scholarly literature, and responsible institutional records.

Reddit and other community discussions may identify recurring beginner questions and seller language, but they are not used as mineralogical authority.

Last fact-checked
August 31, 2026
Editorial responsibility
KREATEUR MIAMI
AI assistance and authenticity

KREATEUR MIAMI defines the scope, authors and edits the profiles, reviews the source trail, selects the references, and makes every publication decision. Generative AI assisted with standardized comparison illustrations, drafting consistency, and production organization. Generated images are visibly labeled and are never presented as inventory photographs or proof of authenticity.

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