Aquamarine’s name comes from the Latin for seawater and it was said to calm waves and keep sailors safe at sea. March’s birthstone was also thought to enhance the happiness of marriages. The best gems combine high clarity with limpid transparency and blue to slightly greenish blue hues. Like many beryls, aquamarine forms large crystals suitable for sizable fashioned gems and carvings.


Mineral: beryl

Chemistry: Be3Al2Si6O18

Color: greenish blue, light in tone

Refractive index: 1.577 to 1.583

Birefringence: 0.005 to 0.009

Specific gravity: 2.72

Mohs Hardness: 7.5 to 8.0


Why We Love This Gemstone

Beautiful Crystals

Aquamarine grows in beautiful six-sided prismatic crystals that on rare occasions can be more than a foot long.


Faceted aquamarine is often exceptionally transparent with vitreous luster,
so it really sparkles.


Using a dichroscope, you can see aquamarine is near colorless and stronger blue in different crystal directions.