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Tan Braun

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.

Petrography

Dark red-brown, very coarse crystalline alkali feldspar, rather red coloured along the gap cracks, causes the actual décor of this unusual rock. The dark background is determined by brown feldspar, black biotite and amphibole. Quartz appears in transparent grains. 

Petrogenesis

This rock belongs to the Pre-Cambrian basic mountain range of the Indian sub-continent. Then, melts intruded into the earth crust and solidified in a depth of several kilometres under the surface. The erosion processes since then uncovered the basic mountain range and made the originally lower levels of the earth crust available for quarrying.

Hardness Hard Stone
Structure Type Homogeneous Structure
Synonyms
Group Plutonic rock
Petrographic Assignment Granite
Age > 600 million years (Precambrian)
Colouring Minerals Red-brown to brown alkali feldspar, black biotite, transparent quartz
Average Hardness 6 (according to Mohs’s hardness scale 1-10)
Deposit Karimnagar / Andra Pradesh / India