"Generate an ultra-realistic image of a carbonado, also known as a black diamond

"Generate an ultra-realistic image of a carbonado, also known as a black diamond. The diamond should be shown in its natural, unpolished state, with a rough, irregular surface and an intense, deep black color. Emphasize the stone's opaque quality, with no reflective or shiny surfaces, capturing its dense and matte texture. The background should be simple and dark, perhaps with a soft, diffused light source to subtly illuminate the diamond, allowing the viewer to focus on its unique and mysterious appearance."