Oxy-chromium-dravite

Facts

Chemical formula

NaCr₃(Cr₄Mg₂)(Si₆O₁₈)(BO₃)₃(OH)₃O

Crystal system

Trigonal

Mohs hardness

7.5

Elements in formula

Sodium, Chromium, Magnesium, Silicon, Oxygen, Boron, Hydrogen

Number of elements

7

IMA status

Approved

Type locality

Pereval marble quarry

Named after

Chromium

Sources: Wikidata (CC0), IMA list of minerals via Wikidata · Wikidata Q19861119