IMA mineral species

Grossite

CaAl₄O₇

Oxide mineral.

White & Clear

Grossite specimen
Grossite.png · Wikimedia Commons (see file page for author & license)

Properties

⚖ Density2.896 g/cm³
Average
🔷 Monoclinic✏️ streak white
Chemical formulaCaAl₄O₇
ElementsCa, Al, O
Crystal systemMonoclinic
Mohs hardness—
Density2.896 g/cm³
Streakwhite
Color—
IMA symbolGss
Nickel–Strunz class4.CC.15

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

🌍 Where it's found

Type locality (where it was first described): Hatrurim Basin, Israel · Acfer 182