noun
1. black diamonds plural : coal I 3a
2. : carbonado III
3. : dense black hematite that takes a polish like metal and is sometimes used for intaglios
noun
1. black diamonds plural : coal I 3a
2. : carbonado III
3. : dense black hematite that takes a polish like metal and is sometimes used for intaglios
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012