Moonstone is a feldspar gemstone known best for one thing: a soft blue-white glow that seems to float just under the surface and drift as you tilt it. Gemologists call that glow adularescence. It is also the reason the stone collected centuries of moon folklore. The Romans thought it was formed from moonbeams; later tradition nicknamed it the “Traveler’s Stone.”
The stone is also one of June’s three birthstones, sitting alongside pearl and alexandrite. This guide covers what moonstone is, what the folklore actually says (and where it stops), what each color means, and how to screen a stone before you buy it.
The Short Answer
Moonstone is a variety of orthoclase feldspar that rates 6 to 6.5 on the Mohs scale and has two directions of cleavage, which is why jewelers favor it in pendants and earrings over knuckle-height rings. Its blue-white sheen comes from light scattering and interfering between microscopic alternating layers of orthoclase and albite inside the stone. In recorded folklore it is tied to moonlight, good luck, dreams and safe travel at night — those are documented beliefs, not properties of the mineral.
What Moonstone Symbolizes
Moonstone’s symbolism grew out of what the stone looks like. The sheen swells and fades as the light angle changes. Greeks and Romans both filed it under their lunar deities, and the American Gem Society records the Roman belief that the gem formed from moonbeams and the link to the moon goddess Diana. That is the part of the story with an actual paper trail behind it.
Two later traditions do the rest of the work. Gem lore named it the “Traveler’s Stone,” worn to protect people traveling at night. In India it was treated as a sacred “dream stone” said to bring serene dreams, and it remains one of the country’s traditional wedding gifts. The modern crystal-lore additions — intuition, inner growth, new beginnings — trace to recent crystal writing rather than to any historical record or gemological property.
Plenty of our customers buy on that meaning anyway, which is fine — it is just worth knowing which half of the story is old and which half is new. For how moonstone compares with the other stones people wear as talismans, see our guide to gemstone meanings for men.
The Glow Explained — What Adularescence Is
Adularescence is the billowing blue-white light that moves inside moonstone as you turn the stone or the light source. Moonstone forms as two feldspars — orthoclase and albite — that separate into stacked, microscopically thin alternating layers as the mineral cools. Light falling between those layers scatters and interferes, then comes back out as a soft glow that appears to hover beneath the polished surface. It reads as depth rather than shine, which is what separates it from a surface reflection.
Adularescence is also the reason the cabochon — a smooth, unfaceted dome — is by far the most common cut for moonstone. A curved top gathers the sheen into one continuous rolling band and keeps it visible across a wide range of viewing angles. Faceted material does exist and, per GIA, has become increasingly common, because facets raise brilliance and help hide inclusions; it simply presents the stone differently. The clear cabochon in our Tribal Blossom moonstone pendant is the standard version — a domed stone with the sheen centered on top.
A cabochon is not always cut for the same reason, though. Amethyst has no optical phenomenon to protect, so when our amethyst claw stud earrings use natural amethyst cabochons at 9mm, the dome is doing something different — trading a faceted stone’s sparkle for depth of color.
Moonstone Colors and What Each One Means
Moonstone is graded on three things you can actually see: the body color of the stone, the color of the sheen floating over it, and where that sheen sits — GIA wants it centered on the dome, not sliding off one shoulder. All three are measurable. The meanings attached to each color are not — they come from modern crystal lore, not from mineralogy or documented history. The table keeps the two apart so you can see which is which.
| Variety | What it actually is (gemology) | Associated meaning (crystal lore) |
|---|---|---|
| White / Classic | Milky to near-colorless body with blue, silver or white adularescence. The classic orthoclase moonstone. | New beginnings and clarity |
| Rainbow | Transparent labradorite showing multicolor interference flashes. GIA does not classify it as true moonstone. | Protection and warding off negativity |
| Blue | Near-colorless body with vivid, mobile blue sheen — GIA’s most highly valued combination. | Intuition and emotional clarity |
| Green | Documented green body color, from pale sage through the bright “parrot green” the trade named after a 1997 find in southern India. | Emotional balance and grounding |
| Peach / Pink | Orange-to-yellow body color; the trade name for it is peach. | Warmth and reassurance |
| Grey / Black | Body color running from grey to nearly black, usually with a silvery sheen. | Mystery, protection, introspection |
Color also changes what the stone does in a setting. Against silver, a near-colorless body drops back to almost white between flashes. A green body like the one in our green moonstone pendant keeps its color visible the whole time, so the piece holds its look even when the light is wrong.
💡 Worth knowing: Rainbow moonstone is a trade name, not a gemological one. GIA identifies the material as transparent labradorite — a related feldspar, but not the adularescent orthoclase that “moonstone” properly describes. Both are real stones and both are worth owning. Just ask the seller which one you are buying, because GIA identifies them as different materials.
Moonstone Through History
Moonstone’s documented history runs through three clear moments. Greeks and Romans tied it to their moon deities, and Roman belief held that the gem formed from moonbeams.
Hindu tradition told a close variant: that it was made from the moon’s ethereal light. It was treated as a sacred dream stone. One Indian belief held that romantic partners could read their future together by placing a moonstone in the mouth at full moon.
The third moment is Art Nouveau, roughly the 1890s to 1910s, when moonstone picked up a second life as a designer’s stone without losing the first. René Lalique and Louis Comfort Tiffany both built pieces around it. Lalique’s “Dragonfly” corsage ornament of about 1897–98 — shown at the 1900 Paris Exposition, now in the Calouste Gulbenkian Museum in Lisbon — sets moonstones alongside gold, enamel, chrysoprase, chalcedony and diamonds. No silver on the materials list.
The silver detail is worth flagging, because moonstone-in-silver is a separate lineage: GIA credits it to the Arts and Crafts artisans of the later nineteenth century, who worked the stone into handcrafted silver. Tiffany went a third way and set moonstones in platinum with Montana sapphires. For a stone with a far bloodier history, our garnet meaning and history guide makes the contrast.
Real vs Fake — How to Tell
Moonstone is imitated at both ends of the market. The cheap end is manufactured glass, usually sold as opalite, plus milky resin.
The careful end is assembled fakes: GIA once documented an “imitation rainbow moonstone”: a rock-crystal quartz base with an iridescent coating, cemented to a gypsum top, and the whole cabochon sealed in colorless plastic to fake a glassy luster. The three checks below will flag the obvious ones on a shop counter. They screen — they do not certify.
Move it under one directional light
Genuine adularescence travels through the stone as you tilt it, and it changes with the angle of the light. A flat sheen that looks identical from everywhere is a warning sign. It is not proof on its own — real moonstone cut off-axis can show its sheen through a narrow window of angles only.
Look for centipedes
The most typical natural inclusion in moonstone is a set of tiny tension cracks that gemologists call “centipedes,” named for the long, many-legged shape they make. Finding them is a good sign. Not finding them proves nothing — top-grade moonstone can be nearly transparent and visually clean.
Check for round bubbles and seams
Hold it to the light and look inside the dome. Perfectly round gas bubbles, or a faint mold seam around the girdle, point to glass, plastic or a glued assemblage — the plastic layer on that GIA-documented fake held numerous gas bubbles. For anything expensive, the answer is a gemological report, not a torch and a hopeful squint.
⚠️ Where these checks stop: Visual inspection flags a likely imitation. It cannot confirm that a stone is moonstone. Coated, filled and assembled material is specifically built to survive the tilt test, and telling it apart needs lab instruments. If a stone is expensive enough that being wrong would hurt, ask for an independent identification report before you pay.
Wearing Moonstone (and Keeping It Intact)
Moonstone sits at 6 to 6.5 on the Mohs scale, has poor toughness and cleaves in two directions, so a sharp knock in the wrong plane can split it rather than chip it. GIA’s own guidance is that manufacturers normally put moonstone in pendants, earrings and pins rather than rings, because rings take the most abuse. Keep it away from hard blows, high heat and sudden temperature swings, and store it apart from harder stones that will scratch it.
Hardness is also why we do not make a moonstone ring. Where we do set a cabochon into a ring, it is a harder stone in a protective mount: our black onyx gothic ring runs a quartz-family stone at roughly 7 on the Mohs scale, and its dome sits flush inside a full bezel — no prongs, no raised lip — so nothing is exposed to a side impact. June’s birthstone gets a chain instead.
Both of our pieces are the same build: a 17-gram .925 sterling silver frame at 22mm × 41mm, with the stone as the center and small clear CZ around it. The silver is polished bright on the raised surfaces, with the recesses left dark. That shadowed detail around the stone is what makes the sheen stand out — not a blackened finish over the whole piece.
Both ship as the pendant only, so budget for a chain. A 2 to 3mm box or snake from our sterling silver necklace range suits the weight without overpowering the frame.
Tribal Blossom Moonstone Pendant — .925 Silver
A clear moonstone caged in silver petals, with the blue flash showing through the gaps between them. 17g, 22×41mm, CZ set along the frame.
The two differ in how the stone is held, which matters more than it sounds for a mineral that cleaves. The clear one sits inside a cage of silver petals that cover its shoulders and leave the dome showing through the gaps. The green one is gripped by four heavy claws under a beaded bail, so more of the stone is exposed and more of it is visible — a trade-off, not an upgrade either way.
Green Moonstone Gothic Pendant — .925 Silver
Green moonstone gripped by heavy silver claws under a beaded bail. 17g, 22×41mm, clear CZ set into the surrounding frame.
Both sit in the gothic pendants collection alongside the rest of our stone-set silver, and there are more cabochon designs across the wider sterling silver pendants collection.
Moonstone Glossary
- Adularescence
- The moving sheen itself, which can read blue, silver or white rather than only blue. The word comes from adularia, the feldspar named after Mt. Adular in the Swiss Alps — the historic source that gave the effect its name.
- Orthoclase & albite
- The two feldspars whose alternating layers make classic moonstone. Useful for shopping: true moonstone is the orthoclase group, while labradorite — sold as rainbow moonstone — belongs to the plagioclase side of the family.
- Cabochon
- A gem cut as a smooth dome with no facets. When you are grading one, the test is where the sheen sits: GIA wants it centered on the top of the dome and visible from a wide range of angles, not sliding off one shoulder.
- Centipedes
- Moonstone’s signature inclusion, named for its many-legged shape. They are tension cracks — stress frozen into the stone as it formed, not damage from handling, and not something a jeweler can polish out.
- Opalite
- A trade word, most often for manufactured opalescent glass sold as fake moonstone. It has also been used for plastic opal imitations, so it names an appearance rather than one material.
Buy moonstone on what you can actually inspect: a sheen that travels when you tilt it, a stone seated tight in its setting, and a design that keeps the dome out of the line of fire. The meaning you attach to the color afterwards is yours to pick.