Gem experts differ on the degree of green that makes one stone an emerald and another stone a less-expensive green beryl. Most gemologists, gemological laboratories, and colored stone dealers call a stone green beryl when its color is “too light” for it to be classified as emerald. Even among that group, however, there’s a difference of opinion about what’s considered “too light.”
2.97 BILLION YEARS
Age of the oldest emeralds, from South Africa.
Pharaoh known for her passion for emeralds.
2011 sales price for Elizabeth Taylor’s emerald pendant – a record $280,000 per carat.
- Mineral: Beryl
- Chemistry: Be3Al2Si6O18
- Color: Vibrant green
- Refractive Index: 1.577 to 1.583
- Birefringence: 0.005 to 0.009
- Specific Gravity: 2.72
- Mohs Hardness: 7.5 to 8
BIRTHSTONES & ANNIVERSARIES
As the gem of spring, emerald is the perfect choice as the birthstone for the month of May. It’s also the gem of the twentieth and thirty-fifth wedding anniversaries.