20.9 Carat Natural Untreated Amethyst Round IGI Certified

SKU: JRO-G482277046
Amethyst
Round

17% OFF

Natural
Unheated / No Heat
IGI Certified

Carat Weight: 20.90 ct
Shape: Round
Dimensions: 19.45 x 16.53 x 10.63 mm
Treatment: Unheated / No Heat

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Why This Stone?

Natural Amethyst
No heat / untreated
20.9 carats
Round
Transparent
IGI certified
Ships Internationally

This round-cut Amethyst weighs 20.9 ct. Cut to 19.45 x 16.53 x 10.63 mm, it displays an even, rich purple that stays vivid under most lighting conditions, and offers a hardness of 7 on the Mohs scale, practical and affordable for everyday wear. This stone is untreated — no heat, no fillers, exactly as it was mined. Comes with an IGI certificate confirming identity and treatment.

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Product Details

Specifications for 20.9 Carat Natural Untreated Amethyst – Round
SKU	JRO-G482277046
Gemstone Type	Amethyst
Shape	Round
Variety	Amethyst
Carat Weight	20.90 ct
Dimensions	19.45 x 16.53 x 10.63 mm
Treatment	Unheated / No Heat
Transparency	Transparent
Certificate	IGI

About This Gemstone

Genuine 20.9 ct Unheated / No Heat Round Amethyst, IGI certified. Ethically sourced and ready to ship — Stone #2139.

Certification

IGI Certified Independently graded before dispatch
Ships With Its Certificate The physical report travels with the stone

Shipping Information

Estimated Ship Date 2–3 business days
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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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