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Understanding Carat Weight

See The Size On Your Hand

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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Loose natural gemstones including sapphire, ruby, emerald, amethyst, peridot, aquamarine, cat's eye and hessonite

Buy Natural Loose Gemstones Online

Some gemstones catch your eye with their color. Others stand out because of a particular shape, size, or detail you have been searching for. At Jamsora, you can explore natural loose gemstones and choose a stone that feels right for your idea, whether you plan to set it in a custom ring, create a personal gift, or keep it in your collection.

Browse our loose gemstones by type, shape, carat weight, and price. Each listing gives you the details of the individual stone, so you can take a closer look before deciding.

Find a Gemstone in the Color You Love

Start with the rich blues of sapphire, the unmistakable red of ruby, or the deep green of emerald. If you are drawn to something different, explore alexandrite, the soft blue of aquamarine, the fresh green of peridot, or the violet tones of amethyst.

You can also discover the distinctive appearance of cat’s eye and the warm tones of hessonite. Each gemstone has its own character, and even stones of the same variety can look noticeably different from one another.

Choose the Stone, Then Make It Yours

Buying a gemstone loose gives you the freedom to decide what happens next. You might choose an oval sapphire for an engagement ring, a pear-shaped emerald for a pendant, or a ruby to mark an occasion. You can also enjoy a beautiful stone just as it is.

As you compare gemstones, look beyond the color. Shape, carat weight, measurements, and treatment details can all affect your choice. Jamsora’s product pages provide stone-specific information and certificate details, helping you find a natural gemstone that suits both your plans and your preferences.

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