Common Crystal Fakes
Understanding which crystals are most commonly faked is your first line of defense. Here are the most frequently imitated stones on the market.
Dyed Howlite as Turquoise
Howlite is naturally white with grey veining. It readily absorbs dye and is frequently sold as turquoise. Genuine turquoise is much harder and has a waxy luster, while dyed howlite often has unnaturally uniform color with visible pores.
Glass as Obsidian
Molded glass is often sold as obsidian, rainbow obsidian, or “volcanic glass.” Real obsidian cools so quickly that it lacks crystal structure. Glass fakes may contain tiny air bubbles visible under magnification.
Heat-Treated Amethyst as Citrine
Much of the “citrine” on the market is actually heat-treated amethyst. Genuine citrine has a warm golden-to-honey color, while baked amethyst typically has a burnt orange or reddish-brown hue and may show color zoning.
Goldstone as “Sunstone”
Goldstone is a man-made glass with copper flecks, not a natural crystal. It is sometimes mislabeled as “goldstone sunstone” or just “sunstone.” Genuine sunstone has natural schiller (a reflective optical effect) from hematite or goethite inclusions.
Reconstituted “Malachite”
Powdered malachite mixed with resin and reformed is sold as solid malachite. Genuine malachite has natural banding patterns that vary throughout the stone, while reconstituted pieces show repetitive, too-perfect bands.
Irradiated Crystals
Some clear quartz and topaz are artificially irradiated to produce vivid colors. These crystals may have unusually intense or uniform coloration not found in nature. While not technically “fake,” they are not natural either.
How to Identify Fakes
Train your eye and trust your senses. Here are the key things to look for when evaluating a crystal's authenticity.
Look for Imperfections
Natural crystals contain imperfections — inclusions, fractures, color zoning, and growth lines. If a crystal looks too perfect, with flawless clarity and perfectly uniform color, it may be synthetic or glass. Genuine crystals tell the story of their formation through their imperfections.
Check the Weight
Crystals are noticeably heavier than plastic or resin. If a stone feels surprisingly light for its size, it may be a fake. Glass can approximate the weight of some crystals, so this test alone is not definitive, but it is a useful first check.
Examine the Temperature
Real crystals feel cool to the touch and take time to warm up in your hand. Glass, plastic, and resin warm up much more quickly. This is because minerals have a higher thermal conductivity than these synthetic materials.
Inspect Under Magnification
A jeweler's loupe or magnifying glass reveals a lot. Look for tiny air bubbles (a sign of glass), uniform dye distribution, unnatural color patterns, or adhesive residue. Natural inclusions like mineral traces, veils, and growth striations are signs of authenticity.
Simple Tests You Can Do at Home
The Scratch Test
Use the Mohs hardness scale. Quartz (hardness 7) should be able to scratch glass. If a “quartz” cannot scratch a glass surface, it is likely fake. Be careful — this test can damage softer genuine stones and is best used as a last resort.
The UV Light Test
Many natural minerals fluoresce under ultraviolet light in specific patterns. Dyed or synthetic stones may fluoresce differently or not at all. A portable UV flashlight is an inexpensive and useful tool for crystal collectors.
The Water Drop Test
Place a drop of water on the surface. On porous stones or dyed stones, the water may absorb or cause the color to bleed slightly. Non-porous genuine crystals will cause the water to bead up and roll off.
The Sound Test
Gently tap two crystals together (same type). Genuine crystals produce a clear, resonant tone. Glass produces a more hollow, tinny sound. This works best with quartz varieties.
Where to Buy Authentic Crystals
The best protection against fake crystals is buying from reputable sources. Here is what to look for in a trustworthy crystal seller.
Ask Questions
Reputable sellers should be able to tell you where their crystals come from, whether they have been treated, and answer basic questions about authenticity. If a seller is evasive, that is a red flag.
Look for Transparency
Sellers who are upfront about treatments, enhancements, and the difference between natural and lab-grown specimens are more likely to be trustworthy. Transparency builds trust.
Check Reviews
Read customer reviews and look for mentions of crystal quality, accuracy of descriptions, and the seller's responsiveness to concerns about authenticity.
Beware of Unrealistic Prices
If a deal seems too good to be true, it probably is. Genuine high-quality crystals have a price that reflects their rarity, quality, and the labor involved in mining and preparation.