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 very fine grain matrix consists mainly of transparent quartz, with maximum grain size of 1 mm. Deposited in between are fine, white feldspar grains. The rock is decorated by dark-brown inclusions of the iron oxide limonite.
Quartzite was generated by metamorphosis of already existing sandstone under high pressure and temperature in the lower areas of the earth's crust or during folding-up of mountain ranges. The previously very porous sandstone was compacted in this process and can now be polished. The quartzite was obviously for some time under high tectonic stresses which caused fine cracks. These have already been healed millions of years ago with limonite iron ore. This intruded along the clefts and "impregnated? the rock in immediate contact.
|Structure Type||Slab with Irregular Pattern|
|Age||Pre-Cambrian (older than 570 million years)|
|Colouring Minerals||Light background: Quartz with some feldspar Dark brown: Limonite|
|Average Hardness||6-7 (according to Mohs's hardness scale 1-10)|