mineral

White Moonstone (Scolicite or White Feldspar var. )

Lattice-structure Silicate (KAlSi3O8)

Hardness: 6-6.5 (Mohs scale), Color: White to milky translucent, Luster: Vitreous to pearly, Crystal structure: Monoclinic, Cleavage: Perfect in two directions, Specific gravity: 2.56-2.59

Hardness: 6-6

Identified April 1, 2026More mineral →

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Physical properties

Hardness: 6-6.5 (Mohs scale), Color: White to milky translucent, Luster: Vitreous to pearly, Crystal structure: Monoclinic, Cleavage: Perfect in two directions, Specific gravity: 2.56-2.59

Formation & geological history

Formed in plutonic and metamorphic rocks, as well as in hydrothermal veins. Often found in pegmatites. Geological age varies greatly by deposit location.

Uses & applications

Primarily used in jewelry as cabochons, beads, or decorative carvings. Also valued by collectors for its optical shimmer (adularescence).

Geological facts

Ancient Romans believed moonstone was formed from frozen beams of moonlight. It is the state gem of Florida even though it is not naturally found there (celebrating the moon landings).

Field identification & locations

Identify by its 'adularescence' (a blue or white glow that moves across the surface) and its characteristic pearly luster. Found commonly in Sri Lanka, India, and Madagascar.

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