Ludwigite

Facts

Chemical formula

Mg₂Fe³⁺O₂(BO₃)

Crystal system

Orthorhombic

Mohs hardness

5.5

Elements in formula

Magnesium, Iron, Oxygen, Boron

Number of elements

4

IMA status

Grandfathered

Named after

Ernst Ludwig

Sources: Wikidata (CC0), IMA list of minerals via Wikidata · Wikidata Q2424234