Erniggliite
A variety of Minerals
What is Erniggliite?
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Erniggliite 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.
Erniggliite Localities Map
See where Erniggliite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Steel gray to black-gray
- Hardness (Mohs)
- 2 - 3
- Density
- 5.24 g/cm³
- Streak
- Reddish black
Chemical Properties
- Chemical Formula
- Tl2SnAs2S6
- Elements
- As, S, Sn, Tl
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Erniggliite FAQs
How do I identify Erniggliite?
Erniggliite can be identified by its hardness of 2 - 3 on the Mohs scale, Steel gray to black-gray color. Look for these key characteristics when examining specimens.
What color is Erniggliite?
Erniggliite typically appears in Steel gray to black-gray. Color can vary depending on impurities and formation conditions.
How hard is Erniggliite?
Erniggliite has a hardness of 2 - 3 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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