Burgenblack
Granite
Structure: The BURGENBLACK is a fine-crystalline, close and very homogeneous depth rock. The BURGENBLACK is as Gabbro to Norit one of the darkest dressed stones. It consists colorless Plagioklas feldspar of black Pyroxenen and black-metallically shining ore minerals (mostly magnetite ore). Subordinated arise olivine, apatite and titanite. Straight ones with nature materials with a uniform grain structure are noticeable to quartz veins and cumulation of minerals (e.g. white clouds) strengthened.
Characteristics: With a degree of hardness of 6-7 in the MOHS hardness scale (1 = chalk, 10 = diamond) the BURGENBLACK ranks among the hard rocks. It is to a large extent frost steady.
Emergence: The BURGENBLACK developed as Plutonit from basic, dark, metalliferous, feldspar-rich and quartz-poor magma, which crystallized in the lower earth's crust in enormous Plutonen in funnel form slowly.
Age: Approx. 1.8 billion years (Precambrian).
Use: The BURGENBLACK is to be used as hard rock in the interior and external architecture, main as floor mats, stairs, fronts, washstands, kitchen sill plates, etc. By the long and even cooling over millions of years developed for the BURGENBLACK typical uniform grain structures. If such basic magmas reach the earth's surface, then they occur as basalt.