Loose Natural Aquamarine Gemstones

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Understanding Carat Weight

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Approximate gemstone size on a U.S. size 6 finger

0.07 ct 33.10 ct

Carat (ct.) is the standard unit used to weigh natural gemstones, including the certified sapphires, rubies, emeralds, and other loose gemstones in our collection, and one gram equals 5 carats. Every gemstone listed on Jamsora shows its exact carat weight alongside its independent lab certificate, so you always know precisely what you're buying.

Matched pairs: when a listing is sold as two stones together, the carat weight shown is their combined total, not the weight of each individual stone.

Carat weight alone doesn't fully describe how large a gemstone will look once set, since two stones of equal weight can appear different sizes depending on their cut and proportions. For a more reliable sense of a stone's visual size, check its millimeter dimensions (length × width × depth), listed on every product page alongside its carat weight and certificate details.

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Gemstone Guide

About Aquamarine Gemstone

Aquamarine is the blue-to-blue-green variety of beryl, named from the Latin for "water of the sea" for its clear, serene color, caused by trace iron within the crystal. The most prized aquamarines show a deep, saturated blue reminiscent of Brazil's famous Santa Maria mines, though fine stones are also found in Nigeria, Madagascar and Pakistan. As the birthstone for March, it has long been a popular choice for both jewelry and collecting. At 7.5 to 8 on the Mohs scale, aquamarine is durable and largely free of visible inclusions compared to other beryls like emerald, and most stones are heat-treated only to remove secondary green or yellow tones and bring out their signature blue — a standard, disclosed practice. Every aquamarine in Jamsora's collection ships with an independent certificate confirming its authenticity and treatment history.

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