*Last updated: July 6, 2026*
Moonstone is a variety of feldspar (most often adularia) known for adularescence — a milky blue glow that "flows" across the stone’s surface with every movement. In this guide, you’ll find a table of physical properties, the stone’s traditional significance, its varieties, ways to distinguish the original from glass opalite, and care instructions.
TL;DR — the essentials in 30 seconds
- Moonstone is a potassium feldspar with a hardness of 6–6.5 — beautiful but more delicate than quartz; it requires careful wearing.
- Its hallmark is adularescence — an internal glow caused by light scattering on the mineral’s micro-layers.
- In tradition, it is a stone of intuition, feminine energy, and new beginnings, associated with the Moon’s cycle.
- It is the birthstone of June; traditionally it favors Cancer, Pisces, and Libra.
- The most common imitation is opalite — milky glass without internal light play. We show how to distinguish it.
Table of contents
- What is moonstone and where does its glow come from?
- Moonstone — physical properties in a table
- What significance is attributed to the moonstone?
- What are the varieties of moonstone?
- Moonstone and zodiac signs
- How to recognize a real moonstone?
- What to pair with moonstone?
- Moonstone in jewelry
- How to care for moonstone?
- FAQ — most common questions
What is moonstone and where does its glow come from?
Mineralogically, moonstone is a variety of potassium feldspar — most often adularia (hence the name of the phenomenon: adularescence). Inside the stone, microscopic layers of two feldspars are alternately arranged: orthoclase and albite. Light scatters at their boundaries and returns to the eye as a soft, bluish-milky glow that seems to "float" beneath the surface and moves with the stone's motion. The thinner the layers, the bluer and more valuable the shine.
The highest quality stones come from Sri Lanka and India; they are also mined in Madagascar, Tanzania, and Myanmar (Burma).
Moonstone — physical properties in a table
| Classification | potassium feldspar (adularia/orthoclase, KAlSi₃O₈) |
|---|---|
| Hardness (Mohs scale) | 6–6,5 |
| Color | colorless, white, peach, gray; glow is blue or silvery |
| Optical effect | adularescence (internal glow) |
| Cleavage | excellent — stone sensitive to impacts |
| Main deposits | Sri Lanka, India, Madagascar, Tanzania, Myanmar |
| Birthstone | June (alongside pearl and alexandrite) |
| Zodiac signs (according to tradition) | Cancer, Pisces, Libra |
What significance is attributed to the moonstone?
Since ancient times, the stone has been associated with the Moon: in Rome, it was believed to have formed from solidified moon rays; in India, it was considered a sacred stone bringing luck and predicting happiness for lovers. In the Art Nouveau era, jeweler René Lalique adored it, and in the 1960s and 70s, it became a symbol of the flower power movement.
In lithotherapy — mentioned here as a tradition and cultural element, not a treatment method — moonstone most often symbolizes:
- intuition — the "moon" energy is said to encourage listening to the inner voice,
- feminine energy and cyclicality — associated for centuries with the rhythm of nature,
- new beginnings — like the new moon; often chosen to start a new phase,
- gentleness of emotions — a symbol of balance in turbulent times.
What are the varieties of moonstone?
- Classic (white/colorless) — with blue or silvery glow; varieties from Sri Lanka with "floating" blue are the most valuable.
- Peach — warm, apricot shade, popular in boho jewelry.
- Gray — smoky, subtle, often combined with oxidized silver.
- Rainbow moonstone — formally a white variety of labradorite with multicolored light play; a close cousin from the feldspar family. You can read more about it in the article on labradorite.
Moonstone and zodiac signs
| Zodiac sign | What is traditionally believed to be supported by moonstone? |
|---|---|
| Cancer | a sign ruled by the Moon — the "mother" stone, symbol of emotional security |
| Pisces | sensitivity, imagination, and intuition |
| Libra | balance and gentleness in relationships |
Also check the full guide on natural stones for zodiac signs.
How to recognize a real moonstone?
The most common imitation is opalite — milky glass with a bluish sheen, sometimes sold as "sea opal" or "artificial moonstone." Differences:
- Glow characteristic: in natural stone, the blue glow "moves" inside when rotated and is visible only at certain angles; opalite shines evenly from the entire volume at every angle.
- Structure: under a magnifier, a natural stone shows layers and small inclusions (characteristic "centipedes" — microcracks); glass is perfectly uniform, sometimes with air bubbles.
- Color in transmitted light: opalite backlit shows an orange reflection — a quick home test.
- Price: natural stones with distinct blue adularescence are noticeably more expensive than cheap opalite beads.
What to pair moonstone with in jewelry and styling?
Moonstone is stylistically versatile, but a few combinations work particularly well:
- Amethyst — the "moonlit purple" duo is a classic in natural stone jewelry; both colors are cool and calm. See our guide on amethyst.
- Amazonite — pastel mint and milky blue create a light, summery combination.
- Pearls — both "June stones" together look noble and harmonious, especially in wedding sets.
- Silver and white gold — cool metals enhance the blue glow; gold plating adds warmth to peachy varieties.
In the wardrobe, moonstone pairs best with white, ecru, powder pink, and light denim. It is also one of the most popular stones for gifts — for June birthdays, expectant mothers (symbolizing new beginnings), and as the wedding "something blue."
Moonstone in jewelry
The milky glow looks stunning in silver and light gold, and shines brightest under spot lighting — candles or evening light. Due to its hardness of 6–6.5 and excellent cleavage, earrings, necklaces, and bracelets are best for everyday wear; a moonstone ring should be considered "occasion" jewelry.
All hand-set models — including duets with amethyst and amazonite — can be found in the Brazi moonstone jewelry collection.
Fun facts about moonstone
- Moonstone is the official state stone of Florida — in honor of the Apollo missions launching from Cape Canaveral, although it does not occur naturally in Florida.
- René Lalique and Art Nouveau masters made it a jewelry star at the turn of the 19th and 20th centuries; original designs now fetch museum prices.
- In India, it is traditionally considered a stone that brings luck to couples — often given as an engagement gift.
How to care for moonstone?
| Action | Recommendation |
|---|---|
| Cleaning | only lukewarm water with mild soap and a soft cloth |
| Ultrasound / steam | do not use ultrasonic or steam cleaners — risk of cracks along cleavage |
| Impacts | remove jewelry during sports and housework; hardness 6–6.5 is less than quartz |
| Chemicals | avoid perfumes, nail polish, and chlorine directly on the stone |
| Storage | separate pouch — harder stones (quartz, topaz) can easily scratch it |
FAQ — most common questions about moonstone
What properties does moonstone have?
Physically: it is a feldspar with hardness 6–6.5 and characteristic adularescence — an internal bluish glow. In lithotherapy tradition, it symbolizes intuition, feminine energy, and new beginnings; these are cultural beliefs, not healing effects.
For which zodiac sign is moonstone?
Traditionally, it is mainly associated with Cancer (the sign ruled by the Moon), as well as Pisces and Libra. As a birthstone, it is assigned to June.
How to distinguish moonstone from opalite?
Opalite is glass: it glows evenly from every angle, and when backlit gives an orange reflection. Natural moonstone shows a glow only from certain angles and has visible layers and small inclusions under a magnifier.
Is moonstone suitable for everyday wear?
In earrings, necklaces, and bracelets — yes. In rings, caution is needed: hardness of 6–6.5 and perfect cleavage mean a strong impact can damage it.
What is rainbow moonstone?
"Rainbow moonstone" is the trade name for the white variety of labradorite — a related feldspar with a multicolored play of light. It is a beautiful stone, but formally it is not a classic moonstone.