These are very special! They're 14K white gold, marked ADPG 14K, for designer Albert David. I believe the stone is lapis...it tests as a stone for sure, on my Presidium Gem Tester II, not glass, etc. They are so elegant! They weigh 4.9 grams in total, and have the matching 14K white gold backs as well. The backs and the posts on the earrings are marked ADPG 14K, and these have been tested.