Babingtonite

Formula: Ca2(Fe,Mn)FeSi5O14(OH)

Colour: Dark greenish-black

Lustre: Vitreous

Hardness: 5½ – 6

Specific Gravity: 3.34 – 3.37 g/cm3

Crystal System: Triclinic

Name: Named after Dr. William Babington (1756-1833), physician and mineralogist, curator of the John Stuart, 3rd Earl of Bute mineral collection until 1792, founding member and President (from 1822 to 1824) of the Geological Society of London and author of noted systematic books on mineralogy (1796, 1799).

Type Locality: Arendal Iron Mines, Arendal, Agder – Norway

Lustre: Vitreous

Transparency: Opaque