The close-up view of each stone type shows a relatively true image of the crystalline structure and the colouring. This is suitable for grained slabs to a limited extend only. In regard to the colour matching, please take an original sample of the stone from your furniture store as a basis.
This work stone consists of almost the same quantity of black pyroxene and brown-transparent plagioclase-feldspar. Together, this results in the deep black basic colour of typical gabbro. Shimmering, regularly strewed crystals of bronzite appear here as an attractive speciality. Gabbro is not as acid-resistant as granite!
Plutonite has been generated by cooling and solidifying of red-hot liquid rock melt in depth of several kilometres without having ever reached the earth surface. The often gigantic magma bodies (plutons) cool only very slowly, due to which completely crystalline, granular rocks have been formed. In contrast to granite, also a plutonite rock, gabbro is free from quartz. Plutonic rock has only been uncovered after erosion of the covering layers during millions of years and can now be quarried.
|Structure Type||Homogeneous Structure|
|Synonyms||African Silver, Cosmos Black, Silver Galaxy, Stargate|
|Group||Plutonic rock (plutonite)|
|Petrographic Assignment||Gabbro (bronzite-gabbro)|
|Age||570 Million years (Pre-Cambrian)|
|Colouring Minerals||Black pyroxene, silvery to bronze-colour bronzite|
|Average Hardness||6 (according to Mohs's hardness scale 1-10)|