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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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Sale

3.5 Carat Natural Untreated Sapphire – Cushion

3.5 ct · Cushion

$1,458.80 $1,750.56 17% OFF

JRO-P858645912-1

Sale

8.04 Carat Natural Untreated Sapphire – Cushion

8.04 ct · Cushion

$3,351.10 $4,021.32 17% OFF

JRO-SA213372084

Sale

5.53 Carat Natural Untreated Sapphire – Cushion

5.53 ct · Cushion

$2,304.93 $2,765.91 17% OFF

JRO-SA213372095

Sale

5.23 Carat Natural Untreated Sapphire – Cushion

5.23 ct · Cushion

$2,179.88 $2,615.85 17% OFF

JRO-SA213372103

Sale

3.94 Carat Natural Untreated Sapphire – Cushion

3.94 ct · Cushion

$1,094.80 $1,313.76 17% OFF

JRO-G602684735

Sale

8.16 Carat Natural Untreated Sapphire – Cushion

8.16 ct · Cushion

$4,081.35 $4,897.62 17% OFF

JRO-P285108332

Sale

8.44 Carat Natural Untreated Sapphire – Cushion

8.44 ct · Cushion

$3,517.83 $4,221.39 17% OFF

JRO-P154142788

Sale

8.4 Carat Natural Untreated Sapphire – Cushion

8.4 ct · Cushion

$3,501.15 $4,201.38 17% OFF

JRO-P880963354

Sale

10.42 Carat Natural Untreated Sapphire – Cushion

10.42 ct · Cushion

$2,026.78 $2,432.13 17% OFF

JRO-SA213372076

Sale

7.6 Carat Natural Untreated Sapphire – Cushion

7.6 ct · Cushion

$2,745.35 $3,294.42 17% OFF

JRO-SA213372079

Sale

7.19 Carat Natural Untreated Sapphire – Cushion

7.19 ct · Cushion

$899.03 $1,078.83 17% OFF

JRO-P112455240

Sale

8.11 Carat Natural Untreated Sapphire – Cushion

8.11 ct · Cushion

$901.40 $1,081.68 17% OFF

JRO-P226106299

Sale

5.08 Carat Natural Untreated Sapphire – Cushion

5.08 ct · Cushion

$2,823.15 $3,387.78 17% OFF

JRO-P256671263-1

Sale

4.86 Carat Natural Untreated Sapphire – Cushion

4.86 ct · Cushion

$1,755.58 $2,106.69 17% OFF

JRO-SA213372096

Sale

16.5 Carat Natural Untreated Sapphire – Cushion

16.5 ct · Cushion

$1,146.20 $1,375.44 17% OFF

JRO-P600056420

Sale

10.63 Carat Natural Untreated Sapphire – Cushion

10.63 ct · Cushion

$590.75 $708.90 17% OFF

JRO-P147787854

Sale

7.53 Carat Natural Untreated Sapphire – Cushion

7.53 ct · Cushion

$313.85 $376.62 17% OFF

JRO-P543733962

Sale

13.19 Carat Natural Untreated Sapphire – Cushion

13.19 ct · Cushion

$549.75 $659.70 17% OFF

JRO-P871974717

Sale

4.11 Carat Natural Untreated Sapphire – Cushion

4.11 ct · Cushion

$4,568.18 $5,481.81 17% OFF

JRO-SA204164062

Sale

7.53 Carat Natural Untreated Sapphire – Cushion

7.53 ct · Cushion

$12,554.18 $15,065.01 17% OFF

JRO-P553337685

Sale

6 Carat Natural Untreated Sapphire – Cushion

6 ct · Cushion

$9,169.70 $11,003.64 17% OFF

JRO-P760828307

Sale

7.55 Carat Natural Untreated Sapphire – Cushion

7.55 ct · Cushion

IGI Certificate

$1,468.53 $1,762.23 17% OFF

JRO-665455427

Sale

8.08 Carat Natural Untreated Sapphire – Cushion

8.08 ct · Cushion

$561.28 $673.53 17% OFF

JRO-P483344420

Sale

9.47 Carat Natural Untreated Sapphire – Cushion

9.47 ct · Cushion

$526.28 $631.53 17% OFF

JRO-P13540351

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