<h2>7 Crystals That Are Actually Just Common Minerals Under a Fancy Name</h2>

1. "Celestite" is just celestine (strontium sulfate)

Celestite sounds celestial. The name comes from the Latin word for sky, and the pale blue crystal clusters look like they were pulled from a cloud. In reality, celestite is the mineral celestine, with the chemical formula SrSO₃. Strontium sulfate doesn't have any unique optical properties beyond its color, and its primary industrial use is in the production of red fireworks and signal flares — strontium compounds burn with a bright crimson flame.

Raw celestine sells for $1 to $5 per kilogram in industrial quantities. Polished celestite clusters marketed as "celestite" in crystal shops typically sell for $20 to $80 per piece, a markup of several hundred percent. The material is identical. You're paying for the polish, the presentation, and the name.

2. "Selenite" is just gypsum (calcium sulfate dihydrate)

Selenite is one of the best-selling crystals on the market right now, prized for its translucent white blades and smooth satin luster. It's gypsum — CaSO₄·2H₂O — the same mineral used to make drywall, plaster of Paris, and chalk. If you have drywall in your house, you're living inside selenite.

Gypsum is one of the most abundant minerals on earth. It forms in evaporite deposits when seawater evaporates, and large selenite crystals have been found in Mexico's Cave of the Crystals — some measuring over 30 feet long. Raw gypsum costs pennies per kilogram in bulk. The tumbled and polished "selenite" wands sold in crystal shops usually cost $5 to $30, which is reasonable for a decorative object, but buyers should understand they're purchasing a construction material with a nice polish.

3. "Angelite" is just anhydrite (calcium sulfate)

Angelite is marketed as a stone of peace and communication, often sold in soft blue-gray polished stones that feel smooth and warm in the hand. It's anhydrite — CaSO₄ — which is literally just gypsum without the water molecules. When gypsum is heated to about 200°C, it loses its water content and becomes anhydrite. The process is reversible; anhydrite will reabsorb water from humid air and turn back into gypsum over time.

Anhydrite is used as a drying agent in laboratories, a component in cement, and a soil conditioner in agriculture. Raw industrial anhydrite sells for $1 to $3 per kilogram. Polished "angelite" stones typically retail for $5 to $25, and the name alone accounts for most of that premium.

4. "Kyanite" is just aluminum silicate (Al₂SiO₅)

Kyanite is one of the more interesting minerals on this list, not because of its crystal-shop marketing but because of its unusual physical property: its hardness varies depending on the direction you measure it. Parallel to the crystal's long axis, kyanite rates about 4.5 on the Mohs scale. Perpendicular to it, the same crystal rates about 6.5. Very few minerals have this directional hardness variation, and it makes kyanite genuinely useful in industrial applications where hardness in a specific direction matters.

Kyanite's main industrial uses are in the production of ceramics (it's added to porcelain to increase heat resistance) and as a component in spark plugs and other high-temperature insulators. Raw kyanite costs $5 to $15 per kilogram depending on grade. Polished kyanite blades sold as crystals typically run $10 to $40, which is a modest markup given the material's genuine scarcity in gem-quality form.

5. "Sodalite" is just sodium aluminum silicate chloride (Na₄Al₃Si₃O₁₂Cl)

Sodalite is frequently confused with lapis lazuli because both stones are blue with white veining. The difference is significant: lapis lazuli is a rock (a mixture of several minerals including lazurite, calcite, and pyrite), while sodalite is a single mineral. Sodalite's blue is usually lighter and more uniform than lapis, and it lacks the gold flecks of pyrite that characterize genuine lapis.

Sodalite is used industrially as a ore of sodium and in the manufacture of glass and ceramics. Some varieties called "hackmanite" have the rare property of tenebrescence — they change color when exposed to UV light and slowly fade back to their original color in normal light. Raw sodalite costs $2 to $8 per kilogram. Tumbled stones labeled "sodalite" typically sell for $3 to $15, which is a fair price for a decorative mineral specimen.

6. "Howlite" is just calcium borosilicate hydroxide (Ca₂B₅SiO₉(OH)₅)

This is the one that probably causes the most consumer confusion in the entire crystal market. Howlite is a white mineral with gray or black veining that, in its natural state, looks nothing like turquoise. But because howlite is cheap, porous, and takes dye extremely well, massive quantities of it are dyed blue and sold as "turquoise" — sometimes honestly labeled, sometimes not.

Real turquoise is a copper aluminum phosphate (CuAl₆(PO₄)₄(OH)₈·4H₂O) and costs $30 to $500+ per kilogram depending on quality and origin. Howlite costs $1 to $5 per kilogram. The dyed version is visually convincing from a distance, but the veining pattern is a dead giveaway to anyone who's handled real turquoise — howlite's veins are gray and web-like, while turquoise's matrix patterns tend to be darker and more irregular.

Howlite is also used in the manufacture of porcelain tiles and as a source of boron in industrial processes. In its undyed form, it's a perfectly nice-looking stone that sells for $3 to $10 as a tumbled specimen. The problem is when it's dyed and misrepresented as something it isn't.

7. "Unakite" is just granite with epidote

Unakite is a rock, not a mineral — it's a type of granite that contains pink orthoclase feldspar, green epidote, and clear quartz. It was first discovered in the Unakas mountains of North Carolina, which is where the name comes from. It looks distinctive with its mottled pink and green pattern, and it polishes well, which is why it's popular for cabochons and beads.

Granite is one of the most common rocks in the earth's crust, and unakite is not geologically rare. It's quarried in bulk as a dimension stone for building facades, countertops, and landscaping. The same material that sells for $10 to $30 per kilogram as polished "unakite" crystal specimens is available for $2 to $5 per kilogram from stone suppliers. It's a nice-looking rock, but calling it a "crystal" is generous at best.

What this means for buyers

None of this is meant to say these materials are worthless or that people shouldn't enjoy them. A polished selenite wand on a shelf looks beautiful regardless of what the raw material costs at a construction supply warehouse. The issue is transparency. When a seller markets gypsum as "selenite" and charges $25 for a piece that cost $0.10 in raw material, the buyer deserves to know what they're actually getting.

If you're buying crystals because you like how they look and enjoy having them around, buy whatever appeals to you. But if you're paying premium prices because you believe the marketing name corresponds to something rare or chemically unique, it's worth checking the actual mineral name and industrial price first. The information takes about thirty seconds to find on mindat.org or any mineralogy database, and it might save you from spending $80 on what is, in chemical terms, a piece of drywall.