'This 2-word gemstone was once ground to produce ultramarine, a deep blue paint pigment'
lapis lazuli
GEMS & JEWELS: This 2-word gemstone was once ground to produce ultramarine, a deep blue paint pigment
This 2-word gemstone was once ground to produce ultramarine, a deep blue paint pigment
This 2-word gemstone was once ground to produce ultramarine, a deep blue paint pigment
GEMS & JEWELS
lapis lazuli
GEMS & JEWELS