MEXICAN STERLING OBSIDIAN AND CHRYSOPRASE JEWELRY: 6 pieces to include 1) Goldfish pin marked CARLOS 800, 3 5/8'' long. 2) Illegibly hallmarked obsidian mounted necklace, 15 1/2'' l. 3) Unsigned carved obsidian pin, 2 1/2'' h.. 4) Carved obsidian ring, marked with eagle 83. 5) Los Ballestros bracelet, 7'' l. 6) Horacio de la Parra chrysophase bracelet, 7 1/2'' l.