The lapis lazuli crystal is a prized material that has been used to adorn great works of art, from pharaohs' coffins to the Sistine Chapel. It can also be found on King Tut's coffin and other funeral ...

Lapis lazuli is a vividly blue rock, sometimes with streaks of gold, that has been known for millennia for its eye-popping colour and use as a semi-precious gemstone. It gets its colour from the ...