1. [ noun ] (chemistry) colorless glass made of almost pure silica
Synonyms: vitreous_silica lechatelierite crystal quartz_glass
Related terms: natural_glass crystallize crystallize
2. [ noun ] (geology) a hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especially sandstone and granite); yellow sand is quartz with iron oxide impurities
Related terms: mineral quartz_crystal rock_crystal sunstone topaz chalcedony citrine rose_quartz cairngorm amethyst silica silicon
Similar spelling:   quartzose