Inesite

Inesite – Ca2Mn2+7Si10O28(OH)2·5H2O
Class: Silicates – Inosilicates
Crystal System: Triclinic
Hardness: 6
Orthoclase
Talc (1)Diamond (10)
Scratches glass. Harder than a steel knife.
Origin: Hale Creek Mine, Triniti Co. – Usa