Tags: Chemical Substance, Mineral.
Boracite is a magnesium borate mineral with formula: Mg3B7O13Cl. It occurs as blue green colorless gray yellow to white crystals in the orthorhombic – pyramidal crystal system. Boracite also shows pseudo-isometric cubical and octahedral forms. These are thought to be the result of transition from an unstable high temperature isometric form on cooling. Penetration twins are not unusual. It occurs as well formed crystals and dispersed grains often embedded within gypsum and anhydrite crystals.
