Beautiful purple spiny oyster shell earrings. Measuring 2″ in length and 1/2″ in width these are large earrings. They are made from solid sterling silver & hang on silver posts with silver backs. Purple spiny oyster shell is known for its vibrant coloring along with swirls of whites and lavenders. They have a medium weight to them. Signed by the artist B.Joe NAVAJO HANDCRAFTED EARRINGS Purple Spiny Oyster Shell : Living Spondylus shells are, indeed, very spiny, but the polished product looks very smooth the most used Spondylid Bivalve shell colors include orange, reds, and purples and may include distinct striations and color variations. In the American Oceans, the Spondylids occur along the North American coasts, as far north as North Carolina, on the Atlantic Coast, and northwestern Mexico Purple Spiny Oysters grow in deeper water, making them more difficult to find and harvest.