Named after seawater, aquamarine’s fresh watery hue is a cool plunge into a refreshing pool.
Aquamarine is the green-blue to blue variety of the mineral beryl. (Emerald is the green to bluish green variety of the same mineral.) Its color is usually a light pastel greenish blue.
Heat treatment usually gives it a more bluish appearance.
Aquamarine crystals are known to be large in size and relatively clean and well-formed, making them particularly valuable to collectors of mineral specimens.
BIRTHSTONES & ANNIVERSARIES
Aquamarine is the birthstone for March and the gem of the 19th wedding anniversary.
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
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.