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Impala

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

Impala has a homogeneous structure with an average grain size ranging from 0.5 to 1 cm. It consists of bright grey plagioclase feldspar, black to grey-black pyroxene and black-metallic shiny ore. The various mixture constituents are distributed in even concentration throughout the rock, so that a uniform grey-black colouring results. The light-grey feldspar, as well as the black pyroxene sometimes occurs in nest-shape. The possibly rough surface is created by short-term heating of the stone surface and transformation of the upper crystal layer into slate-like structure. 

Petrogenesis

Norite belongs to the plutonic rocks of the dark, basic magma type. A metal containing melt of the upper earth mantle solidified beneath the Precambrian earth crust in homogenous cooling conditions extending over million of years. The homogeneity in the grain structure and structure is the result of this process and the extremely good technical characteristics of this hard rock result from this.

Hardness Hard Stone
Structure Type Homogeneous Structure
Synonyms Impala Nero, African Impala, Nero Africa, Africa Rustemberg
Group Plutonic rock - Plutonite
Petrographic Assignment Granite, gabbro-norite
Age 1.4 billion years (Precambrian)
Colouring Minerals Light-grey feldspar, black pyroxene, black-metallic shining ore minerals
Average Hardness 6 (according to Mohs's hardness scale 1-10) / Natural stone
Deposit South Africa - in the province of Transvaal, near Rustenberg