Callaghanite
A variety of Minerals
What is Callaghanite?
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Callaghanite 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.
Callaghanite Localities Map
See where Callaghanite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Azure-blue
- Hardness (Mohs)
- 3 - 3.5
- Density
- 2.78 g/cm³
- Streak
- White
Chemical Properties
- Chemical Formula
- Cu2Mg2(CO3)(OH)6 · 2H2O
- Elements
- C, Cu, H, Mg, O
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Callaghanite FAQs
How do I identify Callaghanite?
Callaghanite can be identified by its hardness of 3 - 3.5 on the Mohs scale, Azure-blue color. Look for these key characteristics when examining specimens.
What color is Callaghanite?
Callaghanite typically appears in Azure-blue. Color can vary depending on impurities and formation conditions.
How hard is Callaghanite?
Callaghanite has a hardness of 3 - 3.5 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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