Definition of cairngorm in US English:

cairngorm

noun

  • another term for smoky quartz
    • ‘They dated back to the days of Shay Leri and her king Alorath, he remembered vaguely; the old amber velvet that covered the seat and footstool and the great cairngorm set into the back were some of the prizes they had gathered on their travels.’
    • ‘Quartz is colourless when pure but minute amounts of impurities or lattice imperfections give rise to varieties such as amethyst, cairngorm, rose quartz, and smoky quartz.’

Origin

Late 18th century: named after the Cairngorm Mountains.

Pronunciation

cairngorm

/ˈkernɡôrm//ˈkɛrnɡɔrm/