A Proterozoic-aged norite from India’s Eastern Ghats Orogenic Belt. This is probably the most popular and attractive black granite available in the commercial decorative stone trade. It has blackish plagioclase feldspar and bronzite pyroxene crystals. Bronzite is an orthopyroxene and it has a spectacular copper-colored play of color on cut & polished surfaces (even on broken surfaces). The result is a rock surface reminiscent of sparkling stars in space, hence the commercial name "Black Galaxy". This rock is quarried in the Chimkurthi area, Prakasam District, Andhra Pradesh State, southern India.