Is Your Moonstone Real or Fake?

Check your moonstone now

Upload a photo for an instant AI identification — then unlock an authenticity read and its estimated value.

Common moonstone fakes & look-alikes

• Opalite (synthetic glass). An even, milky blue-white surface glow with an almost neon quality; often perfectly clean with occasional round bubbles, and it looks the same from every angle.
• Plain glass 'moonstone'. Flat internal appearance with no directional schiller; may show mold bubbles or seams and feels slightly warm.

Simple at-home tests

1. 1Move it in the light. Real moonstone's blue adularescence floats and shifts direction as you tilt it; opalite's glow stays flat and uniform from all angles.
2. 2Loupe for bubbles. Round internal bubbles indicate glass/opalite; natural moonstone shows fine straight cleavage lines and feather inclusions instead.
3. 3Hardness & feel. Moonstone is feldspar (Mohs 6–6.5) and cool; glass is softer-feeling to scratch tests and often feels warmer to the touch.

At-home tests are indicative, not definitive — for valuable pieces, get a professional gemologist's opinion.

The bottom line

A directional blue glow that moves from inside a translucent body = genuine moonstone. A flat, even milky shimmer that looks identical from every angle (often with bubbles) = opalite or glass.

FAQ

How can I tell if my moonstone is real?

A directional blue glow that moves from inside a translucent body = genuine moonstone. A flat, even milky shimmer that looks identical from every angle (often with bubbles) = opalite or glass.

How much is moonstone worth?

Common milky-white moonstone runs about $5–$40, good blue-sheen cabochons $30–$200, and fine transparent 'blue moonstone' $50–$500+ per carat — with large, clean gem stones going higher. Most moonstone you'll come across sits at the affordable end.

Is moonstone expensive?

Generally no — most moonstone is an inexpensive gem ($5–$40). Only fine 'blue moonstone' — a transparent, colorless body with a vivid floating blue sheen — is expensive, reaching hundreds of dollars per carat.

What is the most valuable moonstone?

Per the GIA, the most valuable moonstone has a near-colorless, semi-transparent body with a vivid, well-centered blue adularescence visible from many angles — the classic 'blue moonstone,' historically from Sri Lanka.

Is rainbow moonstone valuable?

Rainbow moonstone (technically a labradorite) is popular but usually modest — roughly $15–$120 for cabochons — valued for its multicolor flash rather than the prized blue sheen of true blue moonstone.

Is my moonstone real or opalite?

Real moonstone shows a directional blue glow from within that moves with angle; opalite (glass) has a flat, even milky surface glow and may show round bubbles.