Sri Lanka
Historic source of pale moonstone with blue adularescence.
Crystals gemstone profile
Moonstone
Feldspar With Floating Adularescence
Moonstone is feldspar that displays a soft, billowing sheen called adularescence. The effect comes from light scattering through fine intergrown mineral layers.
Gemological Properties
- Chemical composition
- Potassium-sodium aluminum silicate feldspar
- Crystal system
- Monoclinic
- Hardness (Mohs)
- 6
- Color range
- Colorless, white, peach, gray, or green with blue-white sheen
- Primary sources
- Sri Lanka, India, Madagascar, Tanzania, Myanmar
- Luster / transparency
- Vitreous to pearly / Transparent to translucent
Science, structure & identification
A practical field note on what Moonstone is made of, how it forms, how light behaves inside it, and what professionals look for when identifying it.
Browse the plain-language gemstone glossary or learn how to read a lab report.
- Mineral family
- Feldspar · orthoclase-albite intergrowth
- Formation
- Moonstone's microscopic intergrowths formed as feldspar cooled and separated into layers. Light scattering between those layers creates adularescence.
- Optical behavior
- Adularescence is a floating sheen that moves across the cabochon as it is tilted. Transparency, layer scale, body tone, and polish affect its strength.
- Treatments & enhancements
- Most moonstone is untreated, though fracture filling, coatings, dye, and assembled imitations exist. Blue flash should not be confused with surface paint.
- Identification notes
- Feldspar cleavage, refractive index, twinning, and the internal origin of the sheen help separate moonstone from opal and coated glass.
- Care & durability
- Moonstone is moderately soft with cleavage. Use protective settings, avoid hard blows and steam, and clean with warm soapy water.
Where Moonstone is found
Representative source regions, not a map of every occurrence.
India
Produces peach, gray, white, and rainbow moonstone.
Madagascar
Modern source of transparent and colorful feldspar material.
The color spectrum of Moonstone
Color is shaped by chemistry, structure, inclusions, and light. These are representative varieties—not a promise that every stone will show every shade.
Blue sheen
Fine adularescence appears as a floating blue-white glow over a pale body.
White
Classic moonstone with a soft white sheen and translucent body.
Peach
Warm feldspar bodycolor with white to blue adularescence.
Rainbow
Broad interference colors can appear in some transparent material.
Trusted references
Traditional beliefs & modern crystal claims
Gemstones have rich symbolic histories. The claims below are presented as folklore, cultural tradition, or modern pseudoscience—not as proven medical, psychological, or supernatural effects.
Historical lens
Moonstone has carried lunar, fertility, and new-beginning symbolism in South Asian and European traditions.
The floating sheen naturally invited associations with moonlight.
Historical lens
Modern spiritual sources describe moonstone as supporting intuition or hormonal balance.
Those are metaphysical beliefs; moonstone has no demonstrated endocrine or medical effect.
Gemological properties can be measured and tested. Symbolic meaning is personal and cultural; crystals should never replace qualified medical or mental-health care.
History of the Moonstone
Mineral & material history
Moonstone was admired in ancient Rome and India and became a signature gem of Art Nouveau jewelers such as René Lalique.
Cultural Significance
Moonstone carries long-standing lunar symbolism and is associated in modern spiritual traditions with intuition and new beginnings. These associations are cultural or spiritual traditions, not scientifically demonstrated effects.
Cultural meanings and historical beliefs are included for context. They are not scientific evidence or medical advice.
Traditional beliefs & legend
Modern crystal traditions include symbolic meanings for Moonstone. These beliefs are presented as folklore and spiritual practice, not as medical guidance or evidence of physical effects.
This section records cultural history and folklore. These stories are not scientific evidence or medical guidance.
Expert Buying Guide
Look for a centered, mobile sheen over a clean body. Fine blue adularescence is prized; protect the stone from knocks because feldspar has cleavage.
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