This handmade necklace is made from a Seraphinite cabochon set in Argentium Sterling Silver. When I made the wing that hangs beneath it, a face emerged in the upper left-hand side. I thought that was really interesting considering the material I was using.
Seraphinite is a trade name for a particular form of clinochlore, a member of the chlorite group.
Seraphinite apparently acquired its name due to its resemblance to feathers due to its chatoyancy. Seraphinite is named after the biblical seraphs or seraphim angels. With some specimens the resemblance is quite strong, with shorter down-like feathery growths leading into longer "flight feathers"; the resemblance even spurs fanciful marketing phrases like "silver plume seraphinite."
Reference - https://en.wikipedia.org/wiki/Seraphinite