Bandolbright
Granite
Colour: Yellowish-grey Granulit [lat. granum = grain] with reddish volumes and clouds.
Structure: Very light structure from palely yellowish feldspar and highly transparent quartz, clearly direction-orients, although few and very small black sheds are contained only completely of in-regular Biotit (dark mica). On the other hand irregular, often running out, cloudy, colored volumes from shells adjust themselves.
Characteristics: After the MOHS´ hardness scale (1 = chalk, 10 = diamond) possesses BANDOLBRIGHT a degree of hardness from 6 to 7 and ranks thus among the hard rocks. It is to a large extent frost and polish-steadily.
Emergence: BANDOLBRIGHT developed through for a partial or complete melting of rocks of the earth's crust due to rise in temperature, increase in pressure and/or fluid supply (e.g. H2O, CO2) within the earth's crust. Temperatures prevailed to 750°C and pressures above approx. below 1,4 GPa. This corresponds to earth's crust depths from approx. 45 to 50 km depth. The impression of an a regulation of the minerals, partially a Kind of gneiss structure, developed thereby.
Age: starting from 600 millions years (Precambrian).
Use: Interior and external architecture; Floor mats, stairway steps, kitchen sill plates.