Sterling Silver Blue Quartz Titanium Backed Crystal and Moonstone Pendant Necklace and Earrings Set Pendant is 1x.43" and earrings are 1x.5" Titanium-backed blue crystal is coated Gemstones may have been treated to improve their appearance or durability and may require special care. 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