Smoky Quartz.

Smoky quartz is the brown-grey variety of quartz, coloured by natural irradiation acting on traces of aluminium in the lattice over geological timescales. The Alpine and Scottish deposits produced specimens that took thousands or millions of years to acquire their tone. Modern industrial irradiation can produce visually similar material in a few hours, which is why distinguishing natural from treated smoky quartz has become a quiet point of interest for buyers. Treated material often shows an unnaturally even, dense, near-black colour, while natural pieces tend to vary in tone across the crystal.

The stone is the national gem of Scotland and the traditional cairngorm of Highland jewellery, named for the Cairngorm mountains where the best Scottish material was found. Victorian Scottish brooches and dirk handles carried polished cairngorm settings as part of a national style that survives in modern Highland dress.

In modern crystal practice smoky quartz sits with the root chakra and is treated as a quieter sibling to clear quartz. It is the piece people keep at the desk during stressful weeks, in the pocket on travel days, or by the bed when sleep has been broken. The colour gives it a presence that is easy to live with rather than ceremonial. As with all quartz, the hardness of seven makes it suitable for daily wear, with the only caveat being that prolonged direct sun will gradually fade the colour back toward clear.