1 left in stock left in stock
Warning: Last items in stock!
Is a Magnesium Borate Chloride with formula Mg3B7O13Cl and hardness of 7-7.5.
Occurs as blue, green,gray yellow to colorless-white small crystals or in the massive translucent form. Slight soluble in water. Untreated, From Boulby ,Cleveland,U.K.