Vonsenite

Facts

Chemical formula

Fe²⁺₂Fe³⁺O₂(BO₃)

Crystal system

Orthorhombic

Mohs hardness

5.0

Elements in formula

Iron, Oxygen, Boron

Number of elements

3

IMA status

Grandfathered

Named after

Magnus Vonsen

Sources: Wikidata (CC0), IMA list of minerals via Wikidata · Wikidata Q4016431