Terlinguaite
A variety of Minerals
What is Terlinguaite?
Terlinguaite is the naturally occurring mineral with formula Hg2ClO. It is formed by the weathering of other mercury-containing minerals. It was discovered in 1900 in the Terlingua District of Brewster County, Texas, for which it is named. Its color is yellow, greenish yellow, brown, or olive green.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Terlinguaite 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.
Terlinguaite Localities Map
See where Terlinguaite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Yellow-, yellow-green, brown (darkens to olive-green on exposure to light); pale olive-green in transmitted light
- Hardness (Mohs)
- 2 - 3
- Density
- 8.73 g/cm³
- Streak
- Lemon yellow
Chemical Properties
- Chemical Formula
- [Hg3]4+Hg2+Cl2O2
- Elements
- Cl, Hg, O
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Terlinguaite FAQs
How do I identify Terlinguaite?
Terlinguaite can be identified by its hardness of 2 - 3 on the Mohs scale, Yellow- color. Look for these key characteristics when examining specimens.
What color is Terlinguaite?
Terlinguaite typically appears in Yellow-, yellow-green, brown (darkens to olive-green on exposure to light); pale olive-green in transmitted light. Color can vary depending on impurities and formation conditions.
How hard is Terlinguaite?
Terlinguaite 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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