IMA mineral species

Glaucophane

☐Na₂(Mg₃Al₂)Si₈O₂₂(OH)₂

Na-amphibole, double chain inosilicate mineral.

BluePurpleGray

Glaucophane specimen
Glaucophane bleu de Groix.jpg · Wikimedia Commons (see file page for author & license)

Properties

⛏ Mohs hardness6
12345678910
💅🪙🍶🔪💎

Scratches glass; quartz scratches it.

Chemical formula☐Na₂(Mg₃Al₂)Si₈O₂₂(OH)₂
ElementsNa, Mg, Al, Si, O, H
Crystal systemMonoclinic
Mohs hardness6
Density—
Streak—
Color—
IMA symbolGln
Nickel–Strunz class9.DE.25

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