Emerald
The ancients believed that the Emerald held the key to happiness in love and marriage. Roman wives wore it to ensure their husband's fidelity and as protection in childbirth. Cleopatra loved and wore excellent emeralds from her own mines. The Emerald's value increases with depth of color and freedom from flaws.
- Hardness: 7.5-8
- Refractive Index: 1.577-1.583
- Usually oiled with colorless oil to improve appearance; avoid temperature changes and chemicals