The minerals are classified into following groups:- 1. Quartz Group 2. Feldspar Group 3. Mica Group 4. Amphibole Group 5. Garnet Group 6. Kaolin 7. Carbonate Group 8. Sulphide Group 9. Oxide Group 10. Sulphate Group 11. Staurolite and Talc. 1. Quartz Group: Form—Granular Colour—(Varieties of quartz) Streak—Colourless Lustre—Vitreous Cleavage—Absent Fracture—Conchoidal to uneven Hardness—7 [High] […]