Black diamonds are on an upward course after years of being a misunderstood stone - or even worse, thought of as a manufactured gem. Still, mainstream consumers know little about this fascinating jewel. Fortunately, their rich story can fuel public interest and provide jewelers with fodder to tempt their customers with this monochromatic nugget.
Various global deposits have produced black diamonds although not all were destined for the jeweler’s bench. Diamond mining’s glory days in Brazil’s 19th century and later in South Africa exposed awesome specimens that intrigued diamond aficionados. The treasures were quickly spirited away into private collections. Unattractive blackish rough that could not be successfully polished for jewelry was routinely classified as industrial-use carbonado.