Sulfate · Mohs 2
Selenite (Gypsum): Identification, Meaning & Care
Selenite is a transparent to translucent variety of gypsum. It is exceptionally soft and easily scratched.
Selenite (Gypsum) properties
- Formula
- CaSO₄·2H₂O
- Mineral group
- Sulfate
- Mohs hardness
- 2
- Color
- Colorless, white, or pale gray
- Transparency
- Transparent to translucent
- Luster
- Vitreous to pearly
- Cleavage / fracture
- Perfect
How to identify Selenite (Gypsum)
- Often forms clear blades, plates, or fibrous satin spar.
- Can be scratched by a fingernail, but avoid deliberate testing on valued pieces.
- Edges abrade easily and may develop a powdery appearance.
Selenite (Gypsum) care
Water
Keep dry. Gypsum is water-sensitive and easily damaged.
Light & heat
Avoid heat and prolonged harsh display conditions.
Storage
Store separately from harder materials and cushion sharp edges, points, or cleavage-prone faces.
Traditional meaning
Often used symbolically for clarity or cleansing in contemporary practice.
Traditional symbolism is presented as cultural history or personal practice, not as a scientific or medical claim.
Sources & further checking
- Mindat mineral database
- GIA Gem Encyclopedia
- RRUFF mineral database
- International Mineralogical Association
See our full methodology.