AllMineralsRock
Pyrite
Pyrite is a very popular gemstone (marcasite) composed of iron sulfide. [1]
Pyrite: Quick Facts and Characteristics
Some quick facts for Pyrite:- Transparency: Pyrite is opaque.
- Luster: In terms of luster, pyrite is metallic.
- Streak: Pyrite streaks black, black green or green.
- Specific Gravity: Pyrite's specific gravity ranges from 4.9 to 5.2.
Pyrite: Background and Summary
Pyrite, also known as iron pyrite or fool's gold, is a mineral with a metallic luster and a brass-yellow color. It is composed of iron disulfide (FeS2) and is commonly found in sedimentary rocks, metamorphic rocks, and hydrothermal veins. Pyrite is often mistaken for gold due to its color and metallic appearance, but it is much less valuable than gold.One way to identify pyrite is by its crystal structure. Pyrite crystals are usually cubic or octahedral in shape and have a distinctive striated pattern on their faces. Another way to identify pyrite is by its hardness. Pyrite has a hardness of 6-6.5 on the Mohs scale, which is harder than most other minerals except for quartz and some garnets.
Pyrite has several uses in industry and technology. It is used to make sulfuric acid, which is used in the production of fertilizers, detergents, and other chemicals. Pyrite is also used as a source of iron in the production of steel and other alloys. In addition, pyrite is sometimes used as a gemstone and is cut and polished into cabochons and faceted stones.
Pyrite: Table of Properties
| Attribute | Pyrite (src) |
|---|---|
| Transparency | opaque |
| Chemical Formula | FeS2 |
| Chemical Composition | iron sulfide |
| Specific Gravity | 4.9, 5.2 |
| Streak | black green, green, black |
| Hydrous | No |
| Colors | common: yellow sometimes: gray, pale, iridescent |
| Solubility | Insoluble in water |
| Category | sulfide |
Pyrite: FAQ
Q: Is pyrite dangerous?A: Pyrite is not dangerous to handle, but it can release sulfuric acid when it comes into contact with water or oxygen. This can make pyrite-containing rocks and soil acidic and potentially harmful to plants and animals.
Q: Can pyrite be used for jewelry?
A: Yes, pyrite is sometimes used as a gemstone and is cut and polished into cabochons and faceted stones.
Q: How can I tell the difference between pyrite and gold?
A: Pyrite and gold can look similar, but gold is much softer and more malleable than pyrite. Gold also has a distinct yellow color, while pyrite has a more brassy or greenish-yellow color. Additionally, gold is denser than pyrite and will feel heavier in your hand.
Sources
- Pyrite: https://en.wikipedia.org/wiki/Pyrite
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