Hambergite Is a Berillium Borate Hydroxide with formula: Be2(BO3)(OH) , hardness 7.5. Quite rare mineral, the best cutting material comes from Maharitra and Betafo ,south Madagascar . It is found colorless, yellowish and reddish. This gem has a baguette step cut and is eye clean. Size: 9.5x4.6x4.5 mm. Weight: 1.30 ct. CODE#2065