The Selene Necklace ~ moonphase pendant crushed kyanite.  Also available in other stone choices combined with gold leaf flake.
 
30" antique bronze chain.  Crushed crystal + gold leaf flake sealed under layers of resin in an open bezel setting.  Round bezel setting is 24kt gold plated.  Brass charm with moon phases cut out hangs beneath.  Necklace is reversible and backside of phases is textured as shown in second photo. 
 
Also available in turquoise + gold flake, lapis.+gold flake, chrysocolla + gold flake or peach selenite + gold flake.