Real Gemstone or Glass? 5 Ways to Tell the Difference Before You Buy
You're shopping for a birthstone necklace, and every listing says "amethyst" or "blue topaz." But how do you actually know what's inside the setting? Between natural gemstones, lab-created (synthetic) stones, and plain dyed glass, the word on the product page doesn't always tell the full story — and the difference matters more than most shoppers realize.
Here's how to tell what you're actually buying, and why it's worth checking before you check out.
Why This Distinction Matters
A natural gemstone is formed underground over millions of years and mined. A synthetic (or "lab-created") gemstone has the same chemical and optical properties as its natural counterpart but is grown in a laboratory in weeks. Glass — sometimes called "crystal" or left unnamed entirely — has none of the mineral properties of either, and is simply colored, cut glass meant to resemble a gemstone.
All three can look similar in a product photo. They are not similar in value, durability, or meaning — especially for gifts like birthstone jewelry, where the point is that the stone is genuinely tied to a birth month or memory, not just colored to match one.
5 Ways to Spot the Difference
1. Check How the Listing Describes It
Reputable sellers will specifically say "natural," "genuine," or "mined" gemstone if that's what it is. Listings that only say "amethyst-colored" or "in the style of" a gemstone, without the word natural or genuine anywhere, are a signal the stone is likely glass or a simulant. The Gemological Institute of America (GIA), the leading authority on gemstone standards, recommends asking directly whether a stone is natural, treated, synthetic, or imitation before purchase (GIA gemstone education resources).
2. Look (or Ask) for Inclusions
Natural gemstones almost always contain tiny internal characteristics called inclusions — small mineral traces, faint clouding, or minor imperfections formed during the stone's natural growth. Glass and synthetic stones are typically flawless to the naked eye, since they're manufactured under controlled conditions. A completely perfect-looking stone in a budget piece is more likely lab-made or glass than a flawless natural gem, which would carry a significantly higher price.
3. Check the Weight and Temperature
Natural gemstones tend to feel cool to the touch and warm up slowly, and many (like amethyst and topaz) are noticeably denser than glass of the same size. Glass warms quickly in your hand and often feels lighter than a genuine stone of the same dimensions. This isn't a lab test, but it's a quick gut-check jewelers themselves use.
4. Price Logic Still Applies
Natural gemstones have real material costs tied to mining, cutting, and grading. If a "natural gemstone" piece is priced at a fraction of what raw material alone would cost, that's the clearest signal of all — the stone is very likely synthetic or glass, regardless of what the listing calls it.
5. Ask the Seller Directly — and See How They Answer
A brand that sources genuine natural gemstones will answer plainly and specifically: which stone, where it's typically sourced, how it's cut. Vague or deflecting answers to a direct question are usually the answer in themselves.
Why It Matters Most for Meaningful Gifts
Birthstone and gemstone jewelry is popular specifically because it's personal — it says "I thought about you, specifically," tied to a birth month, memory, or milestone. That meaning depends on the stone actually being what it claims to be. A dyed glass bead in the "right" color might look identical in a photo, but it isn't the same gift, and if the recipient ever finds out, it can undercut the thoughtfulness that made the gift meaningful in the first place.
Why Praise Jewels Only Uses Natural Gemstones
Every gemstone in a Praise Jewels piece is genuine and natural — sourced, set, and paired with 925 sterling silver, never dyed glass or synthetic stand-ins. When a piece is described as amethyst, blue topaz, or any other natural gemstone, that's exactly what's set into the silver. It's a small detail that matters enormously when the piece is meant to be worn for years, or given as a gift meant to actually mean something.
Explore handcrafted jewelry with genuine natural gemstones at Praise Jewels →