👉 Haldanite is a mineral that belongs to the group of biotite minerals. It is typically found in deposits of basalt or quartz and has been used for centuries as an abrasive, sandblaster, and polishing agent. The primary chemical formula for Haldanite is CaAl2Si4O10(OH)2, where Al is the alkali metal (potassium) and Si is silicon. These elements are found in large quantities in nature, but they are
