Babingtonite
Formula: Ca2(Fe,Mn)FeSi5O14(OH)
Species: Silicates – (Inosilicates)
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