A blue metamorphic rock, well-known for its deep hue, discovered in Afghanistan
6000 years ago that has been used in adornment and jewellery for generations.
Though lapis can vary in hue from greenish blue to violet, the most precious
versions are highly saturated with few calcite inclusions (which appear white) and
minimal gold pyrite flecks. Historically, the stone has also been ground up to be
used as an ultramarine pigment.