Moonstone is loved for its dreamy, floating glow. But that same glow is faked all the time. Cheap glass called opalite is sold as moonstone everywhere.
This guide shows you how to tell real moonstone from fake. You’ll learn the simple tests that give imitations away. You’ll also meet opalite, the number-one moonstone imposter. At Gems Lore, we want you to buy with confidence. Here’s how to spot genuine moonstone.
Real vs. Fake Moonstone at a Glance
- Real moonstone has a sheen that floats and moves as you tilt it.
- The glow appears to come from deep within the stone, not the surface.
- Opalite, the top fake, is man-made glass with a static flash.
- Quick test: backlight it. Opalite glows orange, while real moonstone doesn’t.
What Is Real Moonstone?
Moonstone is a variety of feldspar. Its magic is an effect called adularescence. That’s the soft, billowy blue or white glow that seems to float inside the stone.
The glow shifts as you move the stone. It looks like moonlight caught in water. This floating, moving sheen is moonstone’s signature. It’s also the single hardest thing for a fake to copy. For the stone’s full story, see our moonstone meaning guide.
Moonstone comes in several types. There’s classic white moonstone with a blue sheen. There’s peach, grey, and the popular “rainbow” moonstone. Each shares that dreamy inner glow.
Types of Real Moonstone
Knowing the real types helps you judge authenticity. Genuine moonstone comes in several varieties.
- White moonstone. The classic, with a milky body and a blue or silvery sheen.
- Blue moonstone. Prized for a strong, vivid blue adularescence.
- Rainbow moonstone. Shows blue plus flashes of other colors, though it’s often white labradorite.
- Peach moonstone. A warm, apricot-toned stone with a soft glow.
- Grey moonstone. A smoky, mysterious variety, sometimes called “new moon” stone.
- Cat’s eye moonstone. Displays a moving band of light across the surface.
Each of these is a genuine feldspar. All share that signature floating glow. If a stone has no moving sheen at all, be cautious.
The Most Common Moonstone Fakes
A few imitations show up again and again. Knowing them helps you stay alert.
- Opalite. This is the biggest fake by far. It’s manufactured glass, not a stone at all.
- Frosted or milky glass. Cheap glass beads mimic the milky look.
- Opalescent plastic. Lightweight plastic is sometimes sold as moonstone.
- Mislabeled stones. Some white stones are simply sold under the wrong name.
Our glass vs. crystal guide explains how to tell glass from genuine stone in general.
How to Tell Real Moonstone from Fake
A few simple checks catch most fakes. You mostly just need light and a loupe.
Do the Tilt Test
This is the biggest tell. Tilt real moonstone under a light. The blue-white sheen moves and floats across the stone. It shifts as your angle changes. Fake glass has a flat, static flash that doesn’t travel.
Look for a Floating Glow
Real moonstone’s glow seems to come from within. It sits below the surface, deep in the stone. Opalite’s flash sits on top, like a coating. That difference in depth is easy to see once you know it.
Backlight It
This test exposes opalite fast. Hold the piece up to a light. Opalite glows orange or amber from within. Real moonstone stays cool and blue-white. That orange “fire” is a dead giveaway of glass. It’s the fastest single test in this whole guide.
Check for Bubbles
Glass often traps tiny round bubbles. Hold the piece to the light and look closely. Round bubbles mean glass, never real moonstone. Natural moonstone contains no air bubbles.
Look for Natural Inclusions
Real moonstone usually has small natural flaws. You may see tiny cracks or a slight cloudiness. Some show fine “centipede” inclusions. Glass is often too clean and perfect, apart from its bubbles.
Feel the Temperature
Glass warms quickly in your hand. Real moonstone, being stone, stays cooler for longer. Hold it to your cheek. Fast warmth suggests glass.
Opalite: The Number-One Moonstone Imposter
Opalite deserves its own section. It’s the fake you’ll meet most often. And it fools a lot of buyers.
Opalite is man-made glass. Despite the name, it’s not opal or moonstone. It has a milky body with a single blue flash. Backlit, it glows a telltale orange.
Its sheen is flat and static. It doesn’t float or move like real adularescence. It’s also very uniform and often cheap. Once you know these signs, opalite is easy to catch. The same material is often sold as fake opal, which our real vs. fake opal guide covers.
Rainbow Moonstone vs. White Labradorite
Here’s a naming nuance worth knowing. Much “rainbow moonstone” is actually white labradorite. Both are feldspars, and both are genuine stones. So this isn’t really a fake, just a naming quirk.
White labradorite shows flashes of blue and rainbow color. It’s beautiful and widely loved. It’s simply a close cousin of true moonstone. Our labradorite meaning guide explains the family. The key is that it’s a real stone, not glass.
A Simple Step-by-Step Test
You can check a moonstone in under a minute. Here’s a quick routine.
- Tilt it under light. Watch for a sheen that floats and moves.
- Check the depth. The glow should sit below the surface, not on top.
- Backlight it. Look for an orange glow, which signals opalite.
- Scan for bubbles. Round bubbles mean glass.
- Feel the temperature. Stone stays cooler than glass.
If it passes all five, it’s very likely genuine. If it fails even one or two, be cautious. Use the tests together for the clearest picture.
What Makes Real Moonstone Valuable
Understanding value helps you judge price tells. Not all real moonstone is equal.
The finest moonstone has a strong blue sheen. It’s also fairly transparent, with a clean body. This “blue sheen moonstone” is the most prized. Larger clean stones are rarer and cost more.
Peach, grey, and white moonstones are lovely but usually more affordable. Rainbow moonstone (white labradorite) is popular and widely available. Knowing this helps you spot a suspicious price. A large, flawless, vividly blue “moonstone” for pennies is almost certainly glass.
Does It Actually Matter?
It depends on what you want. For value, it matters a lot. Opalite is cheap glass, so you shouldn’t pay moonstone prices for it. Being misled is the real problem.
For metaphysical use, it’s personal. Many people feel a genuine moonstone carries a different energy. Opalite, being glass, isn’t a natural stone at all. If you like opalite and know what it is, that’s fine. The issue is only paying real-moonstone prices for glass.
Honestly, a little knowledge protects you. Buy what you love, but know what it is. That way your money and your intentions both land where you meant them to.
How to Buy Real Moonstone
A few habits keep you safe:
- Ask for the tilt and backlight tests. A floating blue sheen and no orange glow are good signs.
- Be realistic about price. A big, flawless, cheap “moonstone” is likely opalite.
- Inspect closely. Look for bubbles, a static flash, and an orange backlight.
- Buy from reputable sellers. See our how to buy gemstones online guide.
- Learn the basics. Our how to identify crystals guide builds your eye.
Frequently Asked Questions
How can I tell if moonstone is real?
Tilt it under a light. Real moonstone’s blue-white sheen floats and moves, seeming to come from within. Fake glass has a flat, static flash. Also backlight it: opalite glows orange, while real moonstone stays cool and blue-white.
What is fake moonstone made of?
Most fake moonstone is opalite, a manufactured glass. Frosted or milky glass and opalescent plastic are also used. These imitations have a static flash and may show air bubbles, unlike genuine moonstone.
Is opalite the same as moonstone?
No. Opalite is man-made glass, not moonstone or opal. It has a milky body with a single blue flash and glows orange when backlit. Real moonstone is a natural feldspar with a floating, moving sheen.
Is rainbow moonstone real moonstone?
Much “rainbow moonstone” is actually white labradorite, a close feldspar cousin. It’s a genuine stone, not a fake, just sold under a different name. Both show that lovely floating blue and rainbow sheen.
Why does my moonstone glow orange?
An orange glow when backlit is a warning sign. It usually means the piece is opalite glass, not real moonstone. Genuine moonstone stays cool and blue-white when held up to the light.
Is real moonstone expensive?
It varies. Fine blue-sheen moonstone that’s transparent and clean is the most valuable, especially in larger sizes. Peach, grey, and white moonstones are usually more affordable. A vivid, flawless “moonstone” at a very low price is a red flag for glass.
Can real moonstone be cloudy?
Yes. Genuine moonstone is often slightly cloudy or translucent, and may have tiny natural inclusions or cracks. That’s normal and even reassuring. Glass imitations tend to be either too clear or full of round bubbles.
Caring for Real Moonstone
Once you have genuine moonstone, treat it gently. It’s a fairly soft, delicate stone. It sits around 6 to 6.5 on the hardness scale.
Moonstone can also cleave, meaning it may crack along internal planes. So avoid knocks and hard impacts. Clean it with lukewarm water and a soft cloth. Skip harsh chemicals and ultrasonic cleaners.
Store it away from harder stones to prevent scratches. With a little care, moonstone keeps its dreamy glow for years. This gentleness is also a subtle clue: glass is tougher and less prone to cleaving than real moonstone.
Where to Go From Here
Telling real moonstone from fake comes down to a few checks. Tilt it to see if the glow floats. Backlight it to catch an orange flash. Do that, and opalite won’t fool you again.
To go deeper, see our how to spot fake crystals guide and our how to spot dyed crystals guide. To learn the stone itself, revisit our moonstone guide above, or browse every stone in our crystal meanings chart.
Have you ever been fooled by opalite? Tell us your story in the comments.
