Fantastic pair of earrings from Enrique Ledesma. Known for his fine lapidary and silver work both evident here. The obsidian does change from black to almost a mink then green gold color and we think very pretty but if you want a stone that looks like onyx, not always the case here. Ledesma worked with some of the very best, William Spratling, Hector Aguilar, Los Castillo and went on to open his own shop around 1950. We have other Ledesma pieces in our shop. Measures 1 1/8" x 1/2" with a total weight of 8.70 grams, fully and properly marked, all in fine vintage condition. Feel free to contact with questions and we will respond promptly. Thank you for your visit and may peace be within you.