Gray Moonstone
- The look
- A misty, smoky adularescence, the blue sheen drifting through a cool gray body.
- Color range
- Associated with
- Calm and clarity, new beginnings.
- Structure
- Monoclinic feldspar.
MoonstoneGemstone Guide
The Guide
Moonstone
01
Moonstone at a Glance
Moonstone is a feldspar mineral best known for adularescence: a billowing, internal glow that appears to float just beneath the surface. It's not reflected light. It's light scattered between microscopic layers inside the stone itself.
Hardness
6–6.5
Mohs scale
Mineral Family
Feldspar
Orthoclase variety
Optical Effect
Adularescence
Floating blue glow
Crystal System
Monoclinic
Prismatic habit
Refractive Index
1.518–1.526
Birefringent
Body Color
Translucent
White to gray, peach, rainbow
What Is Adularescence?
The signature optical phenomenon that makes moonstone unlike any other gemstone. Microscopic layers of alternating feldspar minerals (orthoclase and albite) scatter light internally, creating a floating blue or white glow that appears to move across the stone's surface as the viewing angle changes. Named after Mount Adular in Switzerland, where fine moonstone was first documented.
Why "Moonstone"?
Ancient Romans believed the stone was formed from solidified moonbeams. The name has stuck for millennia because the optical effect genuinely resembles moonlight: a soft, ethereal glow that shifts and breathes as you move. In Hindu mythology, moonstone is considered sacred, made from moonbeams crystallized over thousands of years.
02
How Moonstone Forms
Moonstone forms deep in the earth when two feldspar minerals, orthoclase and albite, cool together slowly inside igneous and metamorphic rocks. The magic happens during cooling.
- 01
Magma Cools Slowly
Deep underground, molten rock containing potassium and sodium feldspars begins to cool. At high temperatures, these two minerals mix freely: they're chemically compatible in liquid form.
- 02
Exsolution Begins
As the temperature drops below approximately 650°C, the orthoclase and albite can no longer stay mixed. They separate into alternating microscopic layers: like oil and water settling into bands. These layers are typically only 0.5 micrometers thick.
- 03
Adularescence Is Born
When light enters the stone and hits these sub-microscopic layers, it scatters. The thinner the layers, the bluer the glow. Thicker layers produce a white or silver sheen. The finest blue moonstone has the thinnest, most uniform internal layers, which is why it commands premium prices.
Why Slow Cooling Matters
Rapid cooling produces feldspars without the layered internal structure, and therefore no adularescence. Only moonstone that formed under exactly the right conditions, cooling slowly enough for the layers to develop uniformly, produces the characteristic floating glow. This is why fine moonstone is rarer than it appears.
03
Where Moonstone Comes From
Not all moonstone is equal. The source determines the body color, the quality of adularescence, and the price. Here's what the jewelry world knows about where the best specimens originate.
Sri Lanka: The Gold Standard
Sri Lankan moonstone (also called Ceylon moonstone) produces the finest blue adularescence in the world: a transparent to semi-transparent body with a vivid floating blue sheen. The mines in Meetiyagoda are the most famous source. Fine Sri Lankan material is increasingly scarce and commands premium prices.
India: Rainbow Moonstone
India produces much of the world's "rainbow moonstone", which is technically a transparent labradorite, not true orthoclase moonstone. It displays multicolored flashes (blue, gold, purple) rather than the single blue glow of classical moonstone. Beautiful in its own right, but mineralogically distinct.
Myanmar (Burma)
Myanmar produces high-quality moonstone with strong blue adularescence, sometimes rivaling Sri Lankan material. Less commonly available in the market due to sourcing concerns, but gemologically excellent.
Madagascar & Tanzania
Increasingly important sources producing good-quality moonstone with white to peach body colors. African moonstone tends to be more opaque than Sri Lankan material but can display beautiful adularescence at an accessible price point.
Andrea Li sources moonstone primarily at the Tucson Gem Show, selecting each stone individually for the quality of its adularescence: that floating blue glow is what makes or breaks a moonstone piece.
04
Moonstone Varieties
The name "moonstone" covers several related but distinct gemstones. Understanding the differences matters, especially when you're investing in a one-of-a-kind piece.
| Variety | Classical Moonstone | Rainbow Moonstone | Peach Moonstone |
|---|---|---|---|
| Mineral | Orthoclase feldspar | Labradorite feldspar | Orthoclase feldspar |
| Body Color | Transparent to milky white | Transparent with inclusions | Warm peach to champagne |
| Optical Effect | Blue adularescence (single glow) | Multicolor flash (blue, gold, purple) | Soft white adularescence |
| Primary Sources | Sri Lanka, Myanmar | India, Madagascar | India, Tanzania |
| Price Range | Moderate–premium (for blue) | Affordable–moderate | Affordable–moderate |
| Personality | Ethereal, timeless | Vibrant, magical | Warm, romantic |
Important: "Rainbow moonstone" is technically a transparent labradorite, not true orthoclase moonstone. Both are feldspar minerals and both display beautiful optical effects, but they achieve them through different internal structures. The distinction matters for gemstone purists; for jewelry lovers, both are stunning.
05
Caring for Moonstone Jewelry
Moonstone is softer than many popular gemstones (6–6.5 Mohs vs. 7+ for quartz and beryl). It's absolutely wearable, but it rewards a little attention. Here's what to do and what to avoid.
Do
Store Separately
Keep moonstone in its own soft pouch or lined compartment. Harder stones (quartz, sapphire, diamond) will scratch it if they share space.
Avoid
Hard Impact
Moonstone has two cleavage planes: internal directions where the crystal can split if hit hard. Bezel settings protect the stone better than prong settings for everyday wear.
Do
Clean Gently
Warm water, mild soap, soft cloth. That's it. Moonstone's adularescence comes from its internal structure: no amount of polishing will change or improve the glow. Just keep the surface clean so light can enter freely.
Avoid
Ultrasonic & Steam Cleaners
Both can cause damage along cleavage planes. Never use chemical cleaners, bleach, or abrasive materials. The "last on, first off" rule applies: put moonstone jewelry on after perfume, lotions, and hairspray.
Do
Wear Necklaces & Earrings Daily
Moonstone is perfectly durable for necklaces and earrings, which face minimal impact risk. These are the best everyday moonstone pieces: the stone catches light beautifully at the neck and ear.
Avoid
Heavy-Duty Ring Wear
Rings take the most abuse of any jewelry piece. Moonstone rings are beautiful for occasional wear, but if you're hard on your hands, consider moonstone in a necklace or earrings instead: same stone, less risk.
06
Moonstone as a Bridal Stone
Moonstone is one of the most photogenic gemstones for weddings, and one of the most meaningful. Here's why it's becoming the stone of choice for brides who want something beyond diamonds and pearls.
Why Moonstone Photographs Beautifully at Weddings
Adularescence, that floating internal glow, responds to light in a way that cameras love. In soft ceremony lighting, moonstone glows from within. In golden hour portraits, the blue sheen intensifies. Under reception lighting, it catches every shift and angle. Unlike diamonds (which can blow out in flash photography) or opaque stones (which can read flat), moonstone has a living quality in photos that matches the emotion of the day.
For the Bride
A moonstone necklace or pair of earrings serves as a luminous, non-traditional "something borrowed from the earth." For the bride who was never going to wear the expected strand of pearls, moonstone offers the same elegance with an entirely different energy: ethereal, personal, impossible to replicate.
For the Mother of the Bride
Moonstone's understated glow is elegant without competing with the bride. A sculptural moonstone piece signals taste and intentionality: this is a woman who chose her jewelry as carefully as she raised her daughter.
For Wedding Guests
A one-of-a-kind moonstone piece is a conversation starter that doesn't upstage the couple. The stone's shifting glow gives you something interesting to wear without crossing the line into too-much.
"Something Blue"
Blue adularescence is a natural "something blue", not a novelty garter or a painted sole, but an ancient, organic phenomenon occurring inside a gemstone. For the bride who wants tradition with depth, this is the answer.
Femme Fatale
Explore Our Collection
Penthesilea Long Earrings
Lesbia Long Earrings
Messalina Pearl Earring
Juliette Statement Earring
Matilda Statement Earrings
Isabella Dangle Earrings
Hedda Dangle Earrings
Antoinette Dangle Earrings
Rebecca Dangle Earrings
Cora Drop Earrings
Catherine Ear Drops
Amy Drop Earrings
Hélène Gold Hoop Earrings
Kalika Circle Drop Gemstone Pendant Necklace
Kali Long Multi-circle Gemstone Drop Pendant Necklace
Vishnu Long Gemstone Pendant Drop Necklace
Mohini Long Gemstone Pendant Drop Necklace
Helen Gold Circle Pendant Necklace
Jezabel Gemstone Necklace
Cleopatra Gold Bar Necklace
Salome Pendant Necklace
Medea Pendant Necklace
Sirens Pendant Necklace
Circe Statement Necklace
Visha Kanya Statement Necklace
Mata Hari Long Necklace
Clytemnestra Pendant Necklace
Patasola Lariat Necklace
Vamp Lariat Necklace
Artemisia Long Necklace
Jane Multi Strand Necklace
Veda Layered Necklace 1
Messalina Lariat Necklace
Daji Statement Necklace
Veda Layered Necklace 2
Eve Lariat Necklace
Veda Layered Necklace 3
Delilah Cuff Bracelet
Gilda Cuff Bracelet
Lucrezia Tassel Bracelet
Theda Layered Bracelets 1
Brigid Pearl Bracelet
Jane Gemstone Bracelet
Theda Layered Bracelets 2
Natasha Cuff Bracelet
Theda Layered Bracelets 3
Rachael Cuff Bracelet
Guide to Moonstone Varieties
Gray, Peach, and Rainbow
Peach Moonstone
- The look
- A warm peach glow, soft apricot tones lit from within.
- Color range
- Associated with
- Empathy and growth, feminine energy.
- Structure
- Monoclinic feldspar.
Rainbow Moonstone
- The look
- Multi-color iridescence, the whole spectrum flashing across a clear body.
- Color palette
- Associated with
- Intuition and creativity, protection.
- Structure
- Triclinic. Technically a labradorite.
This stone is part of my pastel gemstone collection, one-of-a-kind pieces handcrafted in Denver.
Moonstone
The Rainbow Moonstone Quality Guide
Unlike diamonds with rigid laboratory certifications, gemstone grading for rainbow moonstone (technically a transparent variety of labradorite) relies on visual quality tiers defined by clarity, flash intensity, and cut.
AAAA / AAA (Extra / High Grade)
Aura-quality
- Exceptional, crystal-clear transparency
- Intense, glowing blue and rainbow flash visible from any angle
- Zero or very few internal inclusions
- Expertly cut symmetrical cabochons with high polish
AA / A (Commercial Grade)
- Translucent to semi-opaque body
- Moderate shimmer or scattered color flashes
- Noticeable internal flaws or speck inclusions
B / AB (Lower / Craft Grade)
- Opaque, milky, or grayish body
- Dull, weak, or completely missing adularescence
- Rough cuts, asymmetrical domes, prominent surface flaws
Core Grading Factors
1. Transparency (Clarity)
The clearer the background body, the higher the value.
2. Adularescence (Flash Quality)
Deep neon blue, electric violet, or full-spectrum rainbow command the highest prices. Weak sheens rank lower.
3. Cut
A smooth, properly proportioned dome maximizes the floating light effect. A flat or lopsided cut traps light.
The Lookbook
Andrea Li Handcrafted Moonstone Jewelry
Moonstone, the feldspar mineral that carries its own light. Adularescence, a floating blue glow born from microscopic layers deep inside the stone, is what makes moonstone unlike anything else in a jeweler's case. It doesn't reflect light. It scatters it.
Andrea Li designed the Femme Fatale collection around moonstone's singular ability to shift and breathe with movement: handcrafting each piece in 14k gold, gold-filled, and sterling silver in her Denver studio. Every piece was one of a kind. Every piece has sold. But the stones themselves keep arriving at the Tucson Gem Show, and Andrea keeps choosing the ones with the strongest blue fire.
Sourced primarily from Sri Lanka and India, moonstone ranks 6–6.5 on the Mohs hardness scale. It's softer than quartz but perfectly suited for everyday necklaces and earrings. If you've ever been drawn to a gemstone that seems to hold moonlight inside it, this is the one.
From the bench · Andrea Li
Why I weave up only one side
A note from Andrea Li, who sets moonstone by hand in her Denver studio.
On the back of my work there is a weave, a web of wire I was told for years to hide and never could. It is the truest part of what I make, where chaos becomes something more beautiful for having come through it. Moonstone is the stone that taught me when to let the weave go quiet.
I wove the cluster up one side of the choker and left the other bare, so the stone's own light could do the talking.
For one piece I built a choker from heavy-gauge 14k gold-filled wire and drilled tiny holes up one side to anchor a gemstone cluster that vines up the length of it, the way something grows toward light. Then I stopped. The other side I left completely bare. With most stones I fill the frame. With moonstone I did the opposite on purpose, because a rainbow moonstone does not need help being seen.
That glow has a name. Adularescence is light scattering between microscopic layers of feldspar inside the stone, which is why a rainbow moonstone, actually a variety of labradorite, throws a whole spectrum of blue as it moves. It is brittle, so I set it cool and gently, never with heat. The weave holds it from behind, the bare side lets it breathe, and the light that lives between its layers becomes the loudest thing in the room. That is the throughline in all my work: knowing what to build, and knowing what to leave alone.
Gifts · Handmade & One-of-a-Kind
Looking for a moonstone gift?
With its floating blue glow, moonstone carries a quiet, otherworldly light, long tied to new beginnings. Each piece is handmade and one-of-a-kind, sculpted by hand in my Denver studio.
Explore the Jewelry Gift Guide →Moonstone
Necklaces
One of a Kind · Built Once
Moonstone
Bracelets
One of a Kind · Built Once
Moonstone
Earrings
One of a Kind · Built Once
See it in a piece
Moonstone at the heart of Halo
The drifting adularescence described above is exactly why marquise moonstones sit at the center of Halo, a one-of-a-kind floating choker from the Second Light collection. Read how a shortage of wire turned into a necklace built to look lit from within.
Read the Halo studio story →One of a Kind: Sold Out
Love What You See? Let Me Make You One.
Every piece in the Femme Fatale moonstone collection was one of a kind: handcrafted once, sold once, never repeated. The pieces shown here have found their owners. But moonstone is a stone Andrea loves working with, and she'd love to design something new for you.
Start a Commission →Moonstone, in plain terms
What makes moonstone glow?
That floating blue or white glow is called adularescence. It comes from light scattering between microscopic layers inside the feldspar, so the sheen seems to drift across the stone as you move. No two moonstones catch the light quite the same way.
What is rainbow moonstone?
Rainbow moonstone is a labradorite feldspar with a clear body and flashes of blue, and sometimes a fuller spectrum. It is prized for that bright blue sheen against a transparent stone. Traditional white moonstone has a softer, milkier glow.
Is moonstone a birthstone?
Moonstone is one of the June birthstones, alongside pearl and alexandrite, and it is long associated with intuition and new beginnings, which also makes it a meaningful bridal stone.
Can I wear moonstone every day?
Moonstone is a little softer, about 6 to 6.5 on the Mohs scale, and can chip if knocked hard, so it is wonderful for earrings and necklaces and best treated gently in rings. Clean it with warm soapy water and a soft cloth, and avoid ultrasonic cleaners.
What stones does Andrea pair with moonstone?
Her moonstone pieces often cluster it with pink amethyst, ametrine, gray and pink sapphires, labradorite, and GIA certified freshwater and Keshi pearls, set in 14k gold-filled and 24k gold vermeil, so the moonstone's glow sits among color and luster.
Can I commission a moonstone piece?
Yes. Every piece is one of a kind, and Andrea can build a moonstone design around the stone and the look you want. Start a commission at andreali.com/custom-shop.
The Kali Long Multi-Circle Gemstone Drop Pendant Necklace is handmade by Andrea Li in her Denver studio, and it is built for someone who wants a necklace that does two things at once: drapes quietly and stops a room.
The chain is 24k gold vermeil over sterling silver in a triangle-link pattern with moonstone rondelle accents threaded through the links. From it hang two circles. The smaller is 1 1/2 inches, gemstone-encrusted with moonstone, sapphire, moss amethyst, mystic quartz, and pearl, with 24k vermeil accent details and mystic labradorite rondelles ringing the setting. The larger is 2 inches across, its full edge wrapped in mystic labradorites. The clasp is 24k gold vermeil over sterling silver, and the wire on the circles is 14K gold-filled. Total pendant length from the top of the chain to the bottom of the large circle is 6 1/4 inches. At 41 inches total, the necklace settles right below the belly button -- the kind of length that layers well over a turtleneck and looks just as right with an open neckline.
Each circle is assembled cold. Every stone is wire-wrapped and set by hand -- no casting, no glue, no heat near the gems. That process is what lets the moonstone rondelles in the chain move independently, each one catching light from a slightly different angle as the necklace shifts. The whole piece is built to have that quality: stones that look like they wandered into an arrangement rather than being locked into one.
One of a kind. When it sells, it is gone. Explore the full Femme Fatale Collection, and see the moonstone guide for more on working with this stone.
• Femme Fatale Collection
• moonstone guide
Andrea Li Designs - Jewelry As Unique As You Are.
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Product Specs:
• 24k gold vermeil over sterling silver triangle chain with moonstone rondelles link chain accents.
• 1 1/2’’ gemstone encrusted circle including moonstone, sapphire, moss amethyst, mystic quartz and pearl with 24k vermeil accents and mystic labradorite rondelles.
• Large 2’’ circle edged with mystic labradorites.
• Pendant length 6 1/4’’ from top to bottom.
• Necklace total length 41’’ typically hits right below the belly button.
• 14k gold filled wire
• 24k gold vermeil over sterling clasp