These dark lapis half moons are cut from a fraudulent material. The rock is indeed lapis, but it is made from rough material that has been ground up into a fine powder and stabilized like turquoise. The darker color is due to pyrite, which yields a black dust when ground up. In virgin lapis, bands of blue lazurite are interspersed with sparkly pyrite and white calcite to produce a much brighter specimen.
Why would I use a fraudulent lapis? I love all the strange scams that float around the rock & mineral world and seek out scandalous material to use. I have my own personal collection of fraudulent rocks - some that I love even more than my authentic material.
The stones are 26mm wide and hang 38mm on hammered 14k gold wire.