Polished Building Stones - Granite and Similar Stones

Granite is a great aesthetic and structural component of constructions. Uniformity in grain size and uniform distribution of the constituent minerals generally control the colour, appearance, quality and the strength of the rock. Based on appearance and commercial utility, granites may be broadly classified as:

a) Black granites (mostly basic/ultrabasic igneous rocks having predominantly mafic minerals such as pyroxenes, amphibole, chlorite biotitie);

b) Red granites (mostly covers alkali granite);

c) Grey and multi-coloured granite (mostly cover calc-alkali granite);

d) Granite gneisses/metamorphic rocks (includes gneisses, migmatites, etc); and

e) Volcanic rocks (rhyolite, basalts, etc)

Further useful and interesting information can be obtained from IS 14223 (Part 1) : 2023 Polished Building Stones — Specification Part 1 Granite and Similar Stones