This is an authentic VAN CLEEF & ARPELS 18K White Gold Black Onyx Diamond Cosmos Clip Pendant. The pendant is crafted of 18 karat white gold and features a cosmos flower motif set with black onyx stones and a center diamond, approximately .29 carat with D color and VVS2 clarity, along with approximately .30 total carat weight of additional diamonds. The pendant can be worn on a necklace or as a brooch.