Mineral variety

Chlorastrolite

Bluish-green sorosilicate, national gemstone of Michigan.

Variety of Pumpellyite-(Mg).

Chlorastrolite specimen
Birds and nature (1903) (14568660339).jpg · Wikimedia Commons (see file page for author & license)

Properties

Chemical formula—
Elements—
Crystal system—
Mohs hardness—
Density—
Streak—
Color—

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