Meant for jewelry designing purposes, this collection of black diamonds has a long-lasting sheen. Round in shape, these opaque gemstones are offered in polished form. These rare diamonds are cheaper than colorless diamonds for their less demand. Due to their carbon and graphite based content, these gemstones have attained black color. Usually black diamonds are heat-treated to attain a distinctively gray color. Heat treatment contributes to the even color of these diamonds. Originated in India, these 10 mm gemstones are offered in polished form. Long-lasting sparkle, standard weight, precise cut, and long-lasing quality are the key aspects of this product range.