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River Gold

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

The very bright hard rock consists largely of light grey transparent quartz and white feldspar. A few percent of red-brown garnet crystals are interspersed. The locally quite strong yellow colouring is caused by the finely dispersed iron hydroxide limonite.

Petrogenesis

Granulate is highly metamorphic rock which can only be generated in the deeper regions of the earth’s crust under high pressures and temperatures. The temperature, however, was not high enough to melt the rock completely. The original rocks were either clay-sandy sediments or also magma rock rich in quartz.

Hardness Hard Stone
Structure Type Slab with Irregular Pattern
Synonyms
Group Metamorphic rock
Petrographic Assignment Gneiss (granulate)
Age > 570 million years (Precambrian)
Colouring Minerals Grey transparent quartz, white feldspar, red garnet, yellow limonite
Average Hardness Approx . 7 (according to Mohs’s hardness scale 1-10)
Deposit India / Tamil Nadu