1.66 Carat Natural Untreated Sapphire Emerald Cut IGI Certified

SKU: JRO-P855992071
Sapphire
Emerald

17% OFF

Natural
Unheated / No Heat
IGI Certified

Carat Weight: 1.66 ct
Shape: Emerald
Dimensions: 7.08 x 5.97 x 3.40 mm
Treatment: Unheated / No Heat

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Why This Stone?

Natural Sapphire
No heat / untreated
1.66 carats
Emerald Cut
Transparent
IGI certified
Ships Internationally

A genuine 1.66 ct oval-cut Sapphire showing a cool, saturated tone that shifts subtly between daylight and incandescent light. This stone is untreated — no heat, no fillers, exactly as it was mined. Cut to 7.08 x 5.97 x 3.40 mm, the stone measures out at a size well suited to a range of jewelry styles. Independently graded by IGI. Every stone here is sold loose and unmounted.

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Product Details

Specifications for 1.66 Carat Natural Untreated Sapphire – Emerald Cut
SKU	JRO-P855992071
Gemstone Type	Sapphire
Shape	Emerald
Variety	Sapphire
Carat Weight	1.66 ct
Dimensions	7.08 x 5.97 x 3.40 mm
Treatment	Unheated / No Heat
Transparency	Transparent
Certificate	IGI

About This Gemstone

Genuine 1.66 ct Unheated / No Heat Emerald Cut Sapphire, IGI certified. Ethically sourced and ready to ship — Stone #563.

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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