Pinolite
A variety of Minerals
What is Pinolite?
Pinolite is a very rare semi-precious stone mined only in Austria and Spain. When cut into cabochons, the surface reveals a peanut-pattern in black and white. These peanut-like shapes are actually the Magnesite crystals, trapped in a substrate of other minerals. Pinolite is a fragile material, but small amounts are turned into beads, cabochons, and tumbled stones.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Pinolite 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.
Quick Facts
Physical Properties
- Color
- Light grey to black, white
- Hardness (Mohs)
- 3.5 - 4.5
- Rock tumbling
- Not recommended
- Density
- 2.7 - 2.8 g/cm³
- Streak
- Blue
Chemical Properties
- Chemical Formula
- MgCO3CaMg(CO3)2
- Elements
- Mg, C, O, Ca, Mg
Also Known As
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Pinolite FAQs
How do I identify Pinolite?
Pinolite can be identified by its hardness of 3.5 - 4.5 on the Mohs scale, Light grey to black color. Look for these key characteristics when examining specimens.
What color is Pinolite?
Pinolite typically appears in Light grey to black, white. Color can vary depending on impurities and formation conditions.
How hard is Pinolite?
Pinolite has a hardness of 3.5 - 4.5 on the Mohs scale. This gives it moderate hardness.
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