mineral
Green Moonstone
Potassium Aluminum Silicate (KAlSi3O8)
AI-generated identification · may be incorrectHardness: 6-6.5 on Mohs scale; Color: Pale mint green to sage; Luster: Vitreous to pearly; Crystal structure: Monoclinic; Cleavage: Perfect in two directions; Specific Gravity: 2.56-2.59
- Hardness
- 6-6
- Color
- Pale mint green to sage
- Luster
- Vitreous to pearly
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Physical properties
Hardness: 6-6.5 on Mohs scale; Color: Pale mint green to sage; Luster: Vitreous to pearly; Crystal structure: Monoclinic; Cleavage: Perfect in two directions; Specific Gravity: 2.56-2.59
Formation & geological history
Formed in plutonic igneous rocks (granite and syenite pegmatites) through slow cooling. The characteristic 'adularescence' (light glow) comes from the alternating micro-layers of orthoclase and albite feldspar that scatter light.
Uses & applications
Primarily used in jewelry (rings, pendants, and cabochons) and as a decorative stone in metaphysical collections and crystal healing.
Geological facts
Green moonstone is sometimes called 'Garnierite' erroneously, though it is actually a variety of Orthoclase feldspar. It is associated with the zodiac sign Cancer and is often linked to calming emotional stress.
Field identification & locations
Identify in the field by its semi-translucent appearance and the 'shimmer' that appears just beneath the surface when rotated under light. Found commonly in India, Sri Lanka, Madagascar, and Tanzania.
