IMA mineral species

Saponite

Ca₀.₂₅(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ * nH₂O

Trioctahedral (Mg2+, Fe2+) smectite, phyllosilicate mineral.

Red Yellow Green Blue White & Clear

Saponite specimen — Chamosite, Saponite, Copper-188771.jpg · Wikimedia Commons (see file page for author & license)

Properties

🔷 Monoclinic✏️ streak white

Chemical formula	Ca₀.₂₅(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ * nH₂O
Elements	Ca, Mg, Fe, Si, Al, O, H
Crystal system	Monoclinic
Mohs hardness	—
Density	—
Streak	white
Color	—
IMA symbol	Sap
Nickel–Strunz class	9.EC.45

“—” means no reliable value in Wikidata yet. Check Mindat for full data.

Varieties & related stones

Griffithite

Learn more

Saponite on Mindat.org
Wikipedia article
Wikidata item Q421003 (source of this page's data – you can correct it there)