| Meteorite(noun, name, stone, jewel) |
| Mexican Fire Opal(expression, name, stone, jewel) |
| Millennium Star(expression, name, extraordinary, diamond) |
| Moldavite(noun, name, stone, jewel) |
| Moon of Baroda(expression, name, extraordinary, diamond) |
| Moonstone(noun, name, stone, jewel) |
| Morganite(noun, name, stone, jewel) |
| Moussaieff Red Diamond(expression, name, extraordinary, diamond) |
| Mystic Quartz(expression, name, stone, jewel) |
| Nassak Diamond(expression, name, extraordinary, diamond) |
| Nizam Diamond(expression, name, extraordinary, diamond) |
| Noor-ol-Ain Diamond(expression, name, extraordinary, diamond) |
| Obsidian(noun, name, stone, jewel) |
| Ocean Dream Diamond(expression, name, extraordinary, diamond) |
| Onyx(noun, name, stone, jewel) |
| Opalite(noun, name, stone, jewel) |
| Oppenheimer Blue(expression, name, extraordinary, diamond) |
| Oppenheimer Diamond(expression, name, extraordinary, diamond) |
| Orlov(noun, name, extraordinary, diamond) |
| Orthoclase(noun, name, stone, jewel) |