Sterling Silver Black Onyx, Labradorite and Hematite Endless Necklace, 36" Gemstones are coated Gemstones may have been treated to improve their appearance or durability and may require special care. Wipe Clean Gently With Soft Dry Cloth After Each Use. Do not wash in solubles. The natural properties and composition of mined gemstones define the unique beauty of each piece. The image may show slight differences to the actual stone in color and texture