“Diamondites (Carbonado diamondites) (3.2 Ga, Mesoarchean) (Bangui Region, Central African Republic)” by James St. John is licensed under CC by 2.0. (One “Ga” means one billion years ago).
Opaque Gray Diamond Specimen
Carbonados from the Central African Republic. These samples date from 3.2 billion years ago. Photo by James St. John. Licensed under CC by 2.0.
Article: What are Black Diamonds and Carbonados?
Credit: James St. John
| Gemstone | Diamond |
| Natural or man made | Natural |
| Gem State | Specimen |
| Color | Gray |
| Transparency | Opaque |