Nobleite
A variety of Minerals
What is Nobleite?
Nobleite is a rare borate mineral with the chemical formula CaB6O9(OH)2·3H2O. It was discovered in 1961, in Death Valley, California, and is named for Levi F. Noble, a USGS geologist, in honor of his contributions to the geology of the Death Valley region. Nobleite has also been identified at two localities in Chile and Argentina.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Nobleite 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.
Nobleite Localities Map
See where Nobleite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Colorless, white
- Hardness (Mohs)
- 3
- Streak
- White
Chemical Properties
- Chemical Formula
- CaB6O9(OH)2 · 3H2O
- Elements
- B, Ca, H, O
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Nobleite FAQs
How do I identify Nobleite?
Nobleite can be identified by its hardness of 3 on the Mohs scale, Colorless color. Look for these key characteristics when examining specimens.
What color is Nobleite?
Nobleite typically appears in Colorless, white. Color can vary depending on impurities and formation conditions.
How hard is Nobleite?
Nobleite has a hardness of 3 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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