-
BIRTHSTONES & ANNIVERSARIES
Sapphire is the birthstone for September and the gem of the 5th and 45th wedding anniversaries.
- COLOR: Every color but red
- REFRACTIVE INDEX: 1.762 to 1.770
- BIREFRINGENCE: 0.008 to 0.010
Diamond is the birthstone for April and the gem of the 60th and 75th wedding anniversaries.
- SPECIFIC GRAVITY: 3.52 (+/- 0.01)
- If you need additional information regarding any of our gems or stones please contact us at: shop@rockshopjewelry.com