Gerhardtite
A variety of Minerals
What is Gerhardtite?
Copper(II) nitrate, Cu(NO3)2, is an inorganic compound that forms a blue crystalline solid. Anhydrous copper nitrate forms deep blue-green crystals and sublimes in a vacuum at 150-200 °C. Copper nitrate also occurs as five different hydrates, the most common ones being the hemipentahydrate and trihydrate.
Uses & Applications
Copper(II) nitrate finds a variety of applications, the main one being its conversion to copper(II) oxide, which is used as catalyst for a variety of processes in organic chemistry. Its solutions are used in textiles and polishing agents for other metals. Copper nitrates are found in some pyrotechnics. It is often used in school laboratories to demonstrate chemical voltaic cell reactions. It is a component in some ceramic glazes and metal patinas.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Gerhardtite 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.
Gerhardtite Localities Map
See where Gerhardtite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Emerald Green
- Hardness (Mohs)
- 2
- Density
- 3.389 g/cm³
- Streak
- Light green
Chemical Properties
- Chemical Formula
- Cu2(NO3)(OH)3
- Elements
- Cu, H, N, O
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Gerhardtite FAQs
How do I identify Gerhardtite?
Gerhardtite can be identified by its hardness of 2 on the Mohs scale, Emerald Green color. Look for these key characteristics when examining specimens.
What color is Gerhardtite?
Gerhardtite typically appears in Emerald Green. Color can vary depending on impurities and formation conditions.
How hard is Gerhardtite?
Gerhardtite has a hardness of 2 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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