Eglestonite
A variety of Minerals
What is Eglestonite?
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Eglestonite 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.
Eglestonite Localities Map
See where Eglestonite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Yellow, orange-yellow, brown; turns dark brownish, then black, on exposure to light; yellow-brown to brown (transmitted light)
- Hardness (Mohs)
- 2.5
- Density
- 8.61 g/cm³
- Streak
- Yellow to greenish-yellow
Chemical Properties
- Chemical Formula
- ([Hg1+]2)3OCl3(OH)
- Elements
- Cl, H, Hg, O
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Eglestonite FAQs
How do I identify Eglestonite?
Eglestonite can be identified by its hardness of 2.5 on the Mohs scale, Yellow color. Look for these key characteristics when examining specimens.
What color is Eglestonite?
Eglestonite typically appears in Yellow, orange-yellow, brown; turns dark brownish, then black, on exposure to light; yellow-brown to brown (transmitted light). Color can vary depending on impurities and formation conditions.
How hard is Eglestonite?
Eglestonite has a hardness of 2.5 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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