Emerald
Chromium provides color to some gemstones, including emerald, ruby, and alexandrite. However, the oxidation state of trace chromium in these gems is 3+, so these gems aren't highly toxic. Emerald pendant, photo by Topzhang. Licensed under CC By 2.0.
Article: Toxic and Radioactive Gems: Safety Tips
Credit: Topzhang
| Gemstone | Beryl, Emerald |
| Natural or man made | Natural |
| Jewelry type | necklace |
| Gem State | Faceted |
| Color | Green |
| Transparency | Translucent |