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.
The black parts consist of fine-grained conglomerate containing transparent quartz, some feldspar and the coloring black biotite-mica. The bright, more or less large lenses are composed of coarsely crystalline, transparent grey quartz and white feldspar. Any yellow to light brown pigments are made up of limonite, an iron oxide.
Paragneiss rocks originate from sandy-clayey oceanic deposits. In the course of the time, layers solidified into clayey sandstones or sandy argillaceous shales. It was only under high pressure and temperatures during the folding up of mountain ranges in the past, that crystalline and, in most cases, clearly directionally orientated rocks were generated.
|Structure Type||Slab with Irregular Pattern|
|Age||570 million years (Precambrian)|
|Colouring Minerals||black biotite-mica, transparent grey quartz, white feldspar|
|Average Hardness||Approx. 6 (according to Mohs’ hardness scale 1-10)|