Benstonite
A variety of Minerals
What is Benstonite?
Benstonite is a mineral with formula Ba6Ca6Mg(CO3)13. Discovered in 1954, the mineral was described in 1961 and named after Orlando J. Benston (1901–1966).
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Benstonite 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.
Benstonite Localities Map
See where Benstonite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- White to ivory, very pale yellow, pale yellowish brown
- Hardness (Mohs)
- 3 - 4
- Density
- 3.695 g/cm³
- Streak
- White
Chemical Properties
- Chemical Formula
- Ba6Ca6Mg(CO3)13 Ba may be replaced by minor Sr, and Ca by minor Mn.
- Elements
- Ba, C, Ca, Mg, O
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Benstonite FAQs
How do I identify Benstonite?
Benstonite can be identified by its hardness of 3 - 4 on the Mohs scale, White to ivory color. Look for these key characteristics when examining specimens.
What color is Benstonite?
Benstonite typically appears in White to ivory, very pale yellow, pale yellowish brown. Color can vary depending on impurities and formation conditions.
How hard is Benstonite?
Benstonite has a hardness of 3 - 4 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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