Selenite

Selenite properties at a glance

Geology & background

Forms through evaporation of saline water in sedimentary environments, creating crystals from gypsum.

Used by ancient Greeks for windows due to its transparency; the name 'selenite' was given by the Greeks.

How to identify Selenite

• Check whether the specimen's color and texture match typical Selenite examples.
• Photograph a fresh surface in natural light and avoid shadows, glare, or wet surfaces.
• Use hardness, streak, luster, grain size, and locality together; no single trait is enough for every specimen.

Where Selenite is found

Selenite is reported from multiple localities or geological settings. Exact locality should be verified from specimen provenance, maps, or field notes.

How much is Selenite worth?

Value depends on size, condition, color, crystal quality, locality, rarity, preparation, and provenance. Treat this as educational guidance, not an appraisal.

Common uses

• Decorative objects
• Spiritual practices
• Plaster production

Interesting facts

• Named after Selene, Greek goddess of the moon
• Giant crystals in Mexico's Cave of Crystals took 500,000 years to form
• Soft enough to scratch with a fingernail

Care & safety

Treat Selenite as a collector specimen unless hardness, cleavage, and fracture are confirmed.

Avoid inhaling dust. Do not cut, grind, or polish unknown specimens without eye protection and a properly rated respirator.

Related rocks & minerals

Gypsum Minerals Halite Minerals Anhydrite Minerals Actinolite Minerals Aegirine Minerals Alabaster Minerals