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  3. Vanadinite Vs Wulfenite

Vanadinite vs Wulfenite: Six Tests That Settle It

By Digital Towns Crystals ยท Last reviewed October 8, 2026

Short answer: count the sides. Vanadinite crystals are six-sided (hexagonal) prisms or barrels, usually red to brownish red; wulfenite crystals are four-sided, thin square plates, usually orange to yellow. Both are heavy lead minerals from weathered lead deposits and both turn up at Mibladen in Morocco and in Arizona, so locality alone does not decide it. Streak and UV help: vanadinite leaves a pale yellow streak and does not fluoresce, while wulfenite streaks white and sometimes glows orange.

How do vanadinite and wulfenite compare side by side?

Feature Vanadinite Wulfenite
Chemistry Lead chlorovanadate, Pb5(VO4)3Cl Lead molybdate, PbMoO4
Lead by weight 73.15% 56.44%
Crystal shape Hexagonal prisms, often barrel-like or hollow Thin square or octagonal plates
Usual color Bright red, orange-red, brown Orange, yellow, orange-red
Streak Light yellow White to yellowish white
Hardness 2.5 to 4 by reference 3
Specific gravity 6.7 to 7.2 6.5 to 7
Cleavage None Imperfect, {101}
UV response Non-fluorescent Sometimes yellow to orange to red
Mineral group Apatite (pyromorphite) group Wulfenite series with stolzite
Signature locality Mibladen, Morocco Red Cloud Mine, Arizona

The numbers come from webmineral and Minerals.net (webmineral vanadinite, webmineral wulfenite). Two rows are the giveaway: crystal shape and streak. The density rows overlap almost completely, so heft cannot separate the two, although it will separate either of them from glass, resin or dyed calcite.

How can you tell them apart by eye?

Test 1: count the sides of a crystal

Find one crystal seen end-on or from above. Six edges around a flat top means vanadinite; Minerals.net describes it as prismatic and stubby hexagonal crystals that are commonly partially hollow or show a hopper growth pattern (Minerals.net). Four edges, or a square with clipped corners that makes an octagon, means wulfenite, which Minerals.net describes as most often thin tabular crystals (Minerals.net).

Test 2: look at the thickness

Turn the specimen and look at a crystal edge-on. Wulfenite plates are typically only a millimeter or two thick relative to their width, like a playing card. Vanadinite crystals are chunky: a short barrel roughly as tall as it is wide, or a flat hexagonal disc that is still noticeably thicker than a wulfenite blade.

Test 3: read the color carefully

Color overlaps, so treat it as a hint. Vanadinite runs bright red, orange, brown and yellow-brown, and the cherry-red Mibladen color is the one most buyers picture. Wulfenite runs bright yellow, orange, orange-red and brown. A red square plate is still wulfenite (Red Cloud material is famous for exactly that), and a yellowish hexagon can still be vanadinite (Touissit produces yellowish crystals).

Which tests confirm the identification?

Test 4: streak

On an unglazed porcelain tile, vanadinite leaves a light or pale yellow streak and wulfenite a white one; webmineral describes it as yellowish white. Use a broken fragment or the back of the matrix, never a display crystal, and wipe the tile afterwards because both powders are lead compounds. Mimetite can be told from vanadinite partly by this test too: Minerals.net notes that vanadinite has a slightly yellow streak and is slightly softer, but that otherwise the two cannot be distinguished with practical methods (Minerals.net).

Test 5: ultraviolet light

Webmineral lists vanadinite as non-fluorescent and wulfenite as fluorescent yellow to orange to red under both shortwave and longwave UV. Minerals.net is more cautious about wulfenite, calling it only occasionally fluorescent. So a glow is good evidence for wulfenite, while no glow proves nothing.

Test 6: cleavage and break

Vanadinite has no cleavage and breaks with a conchoidal to uneven fracture. Wulfenite has imperfect cleavage, and its thin plates break into flat, flaky pieces. You rarely want to test this on purpose, but damaged edges on a specimen show it: chipped wulfenite tends to leave straight steps along the plate, chipped vanadinite a shell-like scoop.

Do vanadinite and wulfenite form the same way?

Yes, which is why they share localities and sometimes share a specimen. Both are secondary minerals in the weathered upper part of a lead deposit. Primary galena breaks down near the surface, and the lead recombines with whatever the groundwater brings. Vanadium makes vanadinite; molybdenum makes wulfenite. Geology.com notes that vanadinite deposits are usually found in arid regions, where that weathered zone stays dry and open long enough for crystals to grow (Geology.com).

Minerals.net lists each mineral as a common associate of the other. The overlap shows in the localities:

  • Morocco. Mibladen is the world source for vanadinite, and thin, platy wulfenite clusters also come from Mibladen and Touissit. Our Morocco guide covers the district.
  • Arizona. The Old Yuma Mine in Pima County and the Rowley Mine near Theba in Maricopa County appear on both minerals' locality lists. Arizona made wulfenite its official state mineral in 2017 (Arizona Legislature).
  • Chihuahua, Mexico. Villa Ahumada at Los Lamentos is known for brown vanadinite and for thick, blocky wulfenite.

What else gets confused with them?

  • Crocoite, lead chromate, is the third orange-red lead mineral on dealers' tables. It grows as long, striated, vertically ridged prisms and needles, not plates or hexagonal barrels, and its best crystals come from Dundas in Tasmania (Minerals.net).
  • Orange barite can mimic wulfenite plates, but it is much lighter and usually comes from different localities.
  • Mimetite and pyromorphite share vanadinite's hexagonal shape. Pyromorphite is usually greener and mimetite redder.
  • Dyed or glass imitations fail the heft test immediately, since neither glass nor dyed quartz comes close to a specific gravity of 6.5 or more.

How do prices compare?

At the low end they cost about the same: small Moroccan vanadinite clusters and small Chinese or Moroccan wulfenite plates sell for similar money, and micro specimens of both are inexpensive. The curves split at the top. Vanadinite prices climb with crystal size, cherry color and contrast on white barite, but Mibladen still yields plenty of good material. Fine wulfenite climbs faster, because large, thin, intact plates are hard to extract and ship, and red classics from Arizona localities such as the Red Cloud Mine carry a strong premium.

Do they mean different things in crystal traditions?

In crystal traditions both are fire-colored stones, and the associations follow the color: vanadinite with focus and stamina, wulfenite with creativity. These are beliefs, not measurable properties, and they do not change how either mineral should be handled.

Which should you buy?

  • Choose vanadinite if you want saturated red, a sturdier crystal shape and the best value per gram of display. Moroccan clusters are the default choice.
  • Choose wulfenite if you like geometric, glassy plates and will display the piece in a closed case, since its plates break easily.
  • Own both if you collect lead minerals. Side by side they make the hexagon versus square lesson obvious to any visitor.

Handling rules are identical for both: hold the matrix, keep them away from food and children, never put them in water, and wash your hands afterwards. Our toxic minerals handling guide has the full routine.

Buying vanadinite and wulfenite side by side

Our current stock allows a direct comparison at several sizes. When reading a listing, check that the locality is named, that dimensions and weight are given, and that close photos show the front crystals' edges.

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Vanadinite and wulfenite in stock

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Frequently asked questions

Can vanadinite and wulfenite occur on the same specimen?

Yes. They form in the same weathered zone of lead deposits and are listed as common associates of each other. Combination pieces exist from Arizona and Mexico. Each crystal is identified by its own shape: hexagons are vanadinite, square plates wulfenite.

Which is more toxic, vanadinite or wulfenite?

Both are lead minerals and both get the same handling rules. Vanadinite is about 73% lead by weight and wulfenite about 56%, but for a collector the practical difference is small. Avoid dust, never use either in water, and wash your hands after handling.

Is red wulfenite actually vanadinite?

Not necessarily. Wulfenite can be orange-red to red, most famously from the Red Cloud Mine in Arizona and from Iran. If the crystals are flat square or octagonal plates, the specimen is wulfenite regardless of color.

Which is harder to keep in perfect condition?

Wulfenite. Its thin plates chip and snap far more easily than vanadinite's stubby prisms. Vanadinite has its own weakness, though: specimens from some localities darken after long exposure to strong light, so both belong in a closed cabinet away from sun.

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