Tetrahedrite
A variety of Tetrahedrite Group
What is Tetrahedrite?
Tetrahedrite is a more complex mineral, as it contains iron, silver, zinc, and up to 15% copper. It is mined for its copper content, but occasionally heavy silver saturations make it even more desirable. The unique tetrahedral shape of the crystals makes them quite fetching additions to a rock collection.
Uses & Applications
Tetrahedrite has some electronic properties akin to a semiconductor, and is therefore sometimes of interest in a commercial capacity. This mineral is used in wiring, photoconductors, and conductive inks. It is also mined to sell as a collector’s item for home décor, because of its attractive crystalline texture and monochromatic color.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Tetrahedrite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Tetrahedrite Localities Map
See where Tetrahedrite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Health & Safety Information
- ⚠️Tetrahedrite dust is toxic because it contains heavy metals Antimony, Copper.
- ⚠️It's advisable to handle tetrahedrite carefully to avoid generating dust and wash hands thoroughly afterward. When cutting or polishing tetrahedrite, wear a dust mask to prevent inhaling heavy metal particles. Store tetrahedrite in a sealed container in a well-ventilated area, away from children and pets. For those involved in crystal healing, never put it in your mouth.
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Quick Facts
Physical Properties
- Color
- Steel gray to iron-gray
- Hardness (Mohs)
- 3.5 - 4
- Density
- 4.97 g/cm³
- Streak
- Black, brown to dark red
- Luster
- Metallic
- Crystal System
- Isometric
Chemical Properties
- Chemical Formula
- (Cu, Fe)12Sb4S13
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Tetrahedrite FAQs
How do I identify Tetrahedrite?
Tetrahedrite can be identified by its hardness of 3.5 - 4 on the Mohs scale, Steel gray to iron-gray color, Metallic luster, Isometric crystal system. Look for these key characteristics when examining specimens.
What color is Tetrahedrite?
Tetrahedrite typically appears in Steel gray to iron-gray. Color can vary depending on impurities and formation conditions.
How hard is Tetrahedrite?
Tetrahedrite has a hardness of 3.5 - 4 on the Mohs scale. This gives it moderate hardness.
