Ippolita Sterling Silver Rock Candy Mini Gelato Short Station Necklace in Black Tie, 16". Sterling silver/hematite/onyx/pyrite. 16-18" adjustable length. Lobster clasp. Almost all gemstones and black diamonds have been treated to enhance their beauty and require special care. Photo may have been enlarged and/or enhanced. Gemstone Treatment and Care. Country Of Origin: Imported.