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.
Coarse grain granite, consisting of white to champagne-coloured feldspar, light grey to transparent quartz and a small portions of biotite (black mica). The biotite is evenly distributed in the rock in the form of fine black scales. Rather rarely, it occurs concentrated in black nests of up to 5 cm in size. The quartz and feldspar crystals are solidly grown together and form a dense and homogeneous crystal structure.
The granites of North Sardinia were generated from several silicic acid-rich magma complexes which, as huge plutonite (plutonic rocks) within the earth crust, slowly crystallised into coarse grain granite. Because of slow cooling-down over several millions of years, there was enough time for the formation (collection crystallisation) of large feldspar crystals.
|Structure Type||Homogeneous Structure|
|Age||330 million years (Carboniferous/Devonian)|
|Colouring Minerals||White feldspar|
|Average Hardness||6-7 (according to Mohs's hardness scale 1-10)|
|Deposit||Italy - in the province of Sassari|