PHYSICAL AND MECHANICAL DATA Commercial name Gray Quoin Granite breed Starobabanskoe deposit Volumetric weight 2690 kg / m3 Water absorption 0.03-0.6% Compressive Strength 145-174 MPa Abrasion 0,05-0,44 g / cm2 Natural Radiation Class 1 Class Starobabanksky granite quarry is a deposit of beautiful stone of dark gray color with a fine-grained texture. In addition to the elegant appearance, this granite stone has excellent physical characteristics: High wear resistance; The first class of natural radioactive radiation (environmentally friendly and safe for residential areas); Strength and durability.