Physical Attributes of Aquamarine Aquamarine is a type of beryl, and is actually just a lighter, bluish colored version of emerald. Its hardness is about 7.5 to 8 on the Mohs scale. The color of aquamarine ranges from pale blue to deep blue, to light green, and can be either opaque or clear. Like all beryl gemstones, aquamarine crystallizes as hexagonal prismatic crystals with vertical striations, and large, near-perfect crystals over 5 inches long are sometimes found, although opaque specimens caused by inclusions are much more common. Most aquamarine is found in Brazil and Colombia, which are traditionally the top
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