Saponite
A variety of Minerals
What is Saponite?
Saponite is a trioctahedral mineral of the smectite group. Its chemical formula is Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2·n(H2O). It is soluble in sulfuric acid. It was first described in 1840 by Svanberg. Varieties of saponite are griffithite, bowlingite and sobotkite. It is soft, massive, and plastic, and exists in veins and cavities in serpentinite and basalt. The name is derived from the Greek sapo, soap. Other names include bowlingite; mountain soap; piotine; soapstone.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Saponite 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.
Saponite Localities Map
See where Saponite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- White, gray-green, bluish, yellow
- Hardness (Mohs)
- 1.5 - 2
Chemical Properties
- Chemical Formula
- Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
- Elements
- Al, Ca, Fe, H, Mg, O, Si
Also Known As
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Saponite FAQs
How do I identify Saponite?
Saponite can be identified by its hardness of 1.5 - 2 on the Mohs scale, White color. Look for these key characteristics when examining specimens.
What color is Saponite?
Saponite typically appears in White, gray-green, bluish, yellow. Color can vary depending on impurities and formation conditions.
How hard is Saponite?
Saponite has a hardness of 1.5 - 2 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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