Why It Matters
Not every “crystal” you see online is natural. The market is full of glass imitations, resin copies, and dyed stones — some of which are simply cheap material passed off as something precious. For collectors, the difference matters twice over: natural stones carry the unique formations and energy that make crystals meaningful, and some dyed or plastic fakes can contain materials you don’t want near your skin or your drinking water.
The good news: with a few simple checks, you can tell a genuine natural stone from a fake — often in under a minute, no equipment needed.
7 Simple Tests to Identify Real Crystals
1. The Temperature Test
Real stone is naturally cool to the touch and stays cool for a moment after you pick it up. Hold the crystal against your cheek or inner wrist: a genuine mineral should feel noticeably cooler than the room. Glass and plastic warm up almost instantly against your skin.
2. Look for Natural Imperfections
Nature doesn’t make perfect things. Real crystals almost always contain small inclusions, color zoning, tiny cracks, or irregular surface texture. If a stone looks flawless, uniform, and plastic-smooth, be suspicious. This is especially true for raw and cluster pieces — a genuine geode or cluster has an organic, irregular structure.
3. Check for Air Bubbles
Glass is the most common crystal fake. Look closely at the stone — a magnifying glass or phone camera zoom helps. Air bubbles are a telltale sign of glass. Natural crystals can have internal inclusions, but they don’t form round, uniform bubbles like those trapped in molten glass.
4. The Hardness Test (Careful)
Quartz — including amethyst, clear quartz, and citrine — ranks 7 on the Mohs hardness scale. It’s harder than glass (5.5) and steel. A careful scratch test on an inconspicuous spot can help: a real quartz point will scratch glass, but glass fakes will not. Skip this test on polished or valuable pieces, and never scratch a stone’s visible face.
5. Examine the Color — Especially Purple
Dyed crystals are everywhere. The giveaway is color distribution: on a natural stone, color is irregular — darker in some zones, paler in others, and often concentrated near the tip of a point. On a dyed fake, color pools in cracks, chips, and along the surface, and the tone looks flat and painted. Heavily dyed quartz is also usually much cheaper than the real thing and often an unnatural, electric shade.
Note: much of the amethyst on the market is heat-treated to deepen its purple — that’s still a natural stone, just enhanced. The test above targets dyed quartz and glass, not heat treatment.
6. Weigh It
Crystal is dense. Pick up the stone — real quartz feels heavier than its size suggests. Glass and, especially, resin and plastic feel noticeably light for their volume. Compare two stones of similar size and the difference becomes obvious quickly.
7. Check the Source and Price
If a “large amethyst cluster” costs less than a coffee, it’s not a large amethyst cluster. Reputable sellers describe exactly what you’re buying: origin, treatment (if any), and the natural characteristics of the piece. Vague listings, stock photos, and “crystal-like” wording are red flags. Buy from sellers who show real photos of the actual piece you’ll receive — and who can tell you where the stone came from.
Red Flags to Watch For
- Uniform color with painted-looking edges — classic sign of dyed quartz.
- Round air bubbles — glass, not stone.
- Plastic-smooth surface on “raw” pieces — genuine raw stone has texture.
- Impossibly low prices — natural crystals cost what they cost.
- Fake “certificates” from unknown sellers — verify the stone, not the paper.
- Strong chemical or plastic smell — a sure sign of resin or plastic.
Natural vs. Enhanced vs. Synthetic: Know the Difference
Not everything that isn’t “100% natural in the ground” is a scam — but you should know exactly what you’re buying:
- Natural (untreated): straight from the earth, nothing changed. The most prized category.
- Enhanced: natural stones that have been heat-treated or waxed to improve color or luster. Common and generally accepted in the industry — amethyst is frequently heat-treated to enrich its purple.
- Synthetic / lab-grown: real crystal composition, but grown in a lab. Fine for tech and jewelry, but not what collectors want as a natural specimen.
- Fake / imitation: glass, resin, or dyed material sold as natural stone. The only category to avoid entirely.
How We Source Our Stones at VIALORRA
Every piece in the VIALORRA collection is a natural stone, hand-selected for its formation and color. Our raw amethyst geodes and clusters keep their natural surface texture — no resin, no dye, no glass. What you see in the photos is the actual piece you receive, and if a stone has been enhanced in any way, we say so.
Start with a piece you can examine up close: a raw amethyst geode cluster is the perfect test case — its natural, irregular structure is exactly what a fake can’t reproduce.