Okavablack
Granite
Structure: The OKAVABLACK is a grey-black gabbro to norit. It consists of light-grey plagioclase feldspar and black to grey-black pyroxene group. Black-metallically shining ore minerals are recognizable partly. The different mixture parts are homogeneous distributed predominantly over the rock, so that a grey-black total character develops. Since the stone is won in numerous quarries, it occurs in a variety of bright, medium till up to dark. Depending upon the process the rock can appear easily arranged.
Characteristics: With a degree of hardness of 6-7 (1 = chalk, 10 = diamond) in the MOHS hardness scale the OKAVABLACK counts to the hard rocks; it is to a large extent frost steady.
Emergence: The OKAVABLACK developed as intrusive igneous rock from alkaline, dark, metalliferous, feldspar-rich and quartz-poor magma, which crystallized slowly in the lower earth's crust in enormous intrusive igneous rock. By the long and even cooling over millions of years developed for the OKAVABLACK typical uniform grain structures.
Age: 2,3 billion years (Präkambrium).
Use: The OKAVABLACK is to be used as hard rock in the interior and external architecture, main as floor mats, stairs, fronts, washstands, kitchen sill plates, etc.