By Didier Descouens (Own work) [CC-BY-3.0], via Wikimedia Commons
Opaque Black Neptunite Specimen
By Didier Descouens (Own work) [CC-BY-3.0], via Wikimedia Commons
Article: Neptunite Value, Price, and Jewelry Information
Credit: via Wikimedia Commons
| Gemstone | Neptunite |
| Natural or man made | Natural |
| Gem State | Specimen |
| Color | Black |
| Transparency | Opaque |