Realgar, or arsenic sulfide, is highly toxic and has historically been used as a poison. "Realgar, quartz, chalcopyrite, galena" by Géry Parent. Licensed under CC BY-ND 2.0.
Translucent Red Realgar Specimen
Realgar (arsenic sulfide), the bright red gem material in this photo, is highly toxic and has historically been used as a poison. Photo by Géry Parent. Licensed under CC By-ND 2.0.
Article: Toxic and Radioactive Gems: Safety Tips
Credit: Géry Parent
| Gemstone | Realgar |
| Natural or man made | Natural |
| Gem State | Specimen |
| Color | Red |
| Transparency | Translucent |