Star K Emerald Cut 10x8mm Genuine Smoky Quartz Pendant Necklace Sterling Silver Metal: 925 Sterling Silver. Dimensions: Width: 10.00 mm Length: 18.00 mm This beautiful design is part of the exclusive Star K. Jewelry collection. Star K, is a reputable American Family Business based in New York since 1986, uses only the highest quality materials, and will proudly stand behind all of her products. In the metaphysical world, Smoky Quartz is one of the most efficient crystals for grounding and cleansing. Smoky Quartz stimulates and balances all chakra centers, is strongly protective,and it is said to improve meditation and bring serenity. 18 inch Chain in a matching metal will be included Additional Stones: