Vanadinite is a rare lead vanadium mineral with formula Pb5(VO4)3Cl. It crystallizes in the hexagonal system and typically forms as hexagonal prisms or dipyramids. Vanadinite is a secondary mineral that forms in the oxidized zone of lead deposits. It is often associated with other lead minerals such as cerussite, anglesite, and pyromorphite.
Properties
Vanadinite is a relatively heavy mineral with a specific gravity of 6.6 to 7.2. It has a hardness of 3 to 4 on the Mohs scale. Vanadinite is brittle and has a perfect cleavage in one direction. The mineral is transparent to translucent and has a vitreous luster. Vanadinite is typically red, orange, or brown in color, but it can also be yellow, green, or blue.
Uses
Vanadinite is a minor ore of vanadium. It is also used as a gemstone and a collector’s mineral. Vanadinite is often cut into cabochons or faceted into gemstones. The mineral is also used in the production of lead-based glass and ceramics.
Occurrence
Vanadinite is a relatively rare mineral. It is found in a few locations around the world, including:
- Mexico
- Namibia
- Morocco
- United States
- China
Value
Vanadinite is a valuable mineral. The price of vanadinite varies depending on the quality of the specimen. High-quality specimens can sell for hundreds of dollars per carat.
Property | Value |
---|---|
Color | Red, orange, brown, yellow, green, blue |
Crystal system | Hexagonal |
Hardness | 3 to 4 |
Specific gravity | 6.6 to 7.2 |
Luster | Vitreous |
Cleavage | Perfect in one direction |
Transparency | Transparent to translucent |
Origin | Secondary mineral in oxidized zone of lead deposits |
Uses | Minor ore of vanadium, gemstone, collector’s mineral, lead-based glass and ceramics |
Table 1: Properties of Vanadinite
Country | Production (tonnes) |
---|---|
China | 10,000 |
United States | 5,000 |
Mexico | 2,000 |
Namibia | 1,000 |
Morocco | 500 |
Table 2: Vanadinite Production by Country
Color | Price per carat |
---|---|
Red | $100 to $500 |
Orange | $50 to $200 |
Brown | $25 to $100 |
Yellow | $10 to $50 |
Green | $5 to $25 |
Blue | $1000+ |
Table 3: Vanadinite Prices
Country | Deposits |
---|---|
Mexico | Mina La Valenciana, Mapimi, Durango |
Namibia | Tsumeb, Otavi Mountain Land |
Morocco | Mibladen, Touissit |
United States | Red Cloud Mine, Arizona |
China | Xiangxi, Hunan |