Whinstone is a provincial name used in the quarrying industry to describe any hard dark coloured rock. Examples include the igneous rocks Basalt and dolerite.
The material supplied by BBS is quarried throughout central Scotland and is a classified as a quartz dolerite. It can be supplied in a range of colours from dark grey through to a dark green and may occasionally contain a reddish variation.This material has been used extensively throughout Scotland over hundreds of years for Kerbs and setts and is today used on exclusive projects where Stone heritage is a key factor, such as Rosslyn Chapel and St. Andrews Cathedral, Glasgow.