Black Galaxy granite is one of the world's most popular granite.Black Galaxy is from near Ongole, Andhra Pradesh, India. The technical geological name for this granite is Gabbric Anorthosite. The material has a hardness of around 6.5 on the Moh's scale which can be termed as moderately hard.
Compression Strength: 2777 Kg/cm2
Water Absorption: 0.04%