mineral
Gypsum Crystal on Basalt
Gypsum on Volcanic Matrix (CaSO4·2H2O)
AI-generated identification · may be incorrectHardness 2 on the Mohs scale, clear or white crystal color, vitreous luster, monoclinic crystal system, perfect cleavage in one direction, specific gravity 2.3.
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Physical properties
Hardness 2 on the Mohs scale, clear or white crystal color, vitreous luster, monoclinic crystal system, perfect cleavage in one direction, specific gravity 2.3.
Formation & geological history
Formed through the evaporation of sulfate-rich mineral waters filling vesicles and fractures in volcanic host rocks over geological time.
Uses & applications
Used in mineral collecting, educational displays, lapidary specimens, and crystal healing.
Geological facts
The specimen features a well-formed selenite or desert rose style gypsum crystal embedded securely inside a porous volcanic matrix.
Field identification & locations
Identify by the very soft hardness (scratched by fingernail) of the clear crystal contrasting against the dark, vesicular igneous host rock.
