Definition
A feldspar gemstone known for adularescence, a floating moonlike sheen.
Key Features
- Hardness about 6 to 6.5 with fair toughness
- Blue sheen on near colorless body is most sought after
- Often cut en cabochon to highlight sheen
- Inclusions and centering of sheen affect value
Origin and History
Sources include Sri Lanka, India, and Madagascar. Rainbow moonstone is a trade name for labradorite feldspar showing multicolor sheen.
Buying Guide
Look for strong centered sheen with minimal cloudiness. Symmetrical cabochons enhance effect.
- Prefer well centered blue sheen on clean body color
- Avoid overly flat cabochons that reduce life
- Check for chips as feldspar can be brittle
Care and Maintenance
Use mild soap and water. Avoid hard knocks and extreme temperature changes.
Related Comparisons
- Labradorite vs Moonstone
- Opal vs Moonstone
FAQs
What causes moonstone sheen
Light scattering from alternating feldspar layers creates adularescence.
Is rainbow moonstone the same as moonstone
It is typically labradorite with multicolor sheen marketed as rainbow moonstone.
Can moonstone be worn daily
Yes with care. Protective settings help reduce chipping.