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6.57 Carat Natural Untreated Sapphire Octagon

SKU: JRO-P922089650
Sapphire
Octagon

$928.00 $1,160.00 20% OFF

Natural
Unheated / No Heat

Carat Weight: 6.57 ct
Shape: Octagon
Dimensions: 11.48 x 9.70 x 5.44 mm
Treatment: Unheated / No Heat

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Authenticity Guaranteed 100% natural
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Includes IGI Certificate (+$100.00)

Why This Stone?

Natural Sapphire
No heat / untreated
6.57 carats
Octagon
Transparent
Ships Internationally

Add an IGI certificate (+$100.00) This stone doesn’t have a certificate yet. We’ll send it to IGI before shipping; the report confirms it’s natural, states any treatment, and is sent with your order. Adds about 10 business days: ships by instead of .

Estimated Ship Date:

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Product Details

Specifications for 6.57 Carat Natural Untreated Blue Sapphire – Octagon
SKU	JRO-P922089650
Gemstone Type	Sapphire
Shape	Octagon
Variety	Sapphire
Carat Weight	6.57 ct
Dimensions	11.48 x 9.70 x 5.44 mm
Treatment	Unheated / No Heat
Transparency	Transparent

About This Gemstone

Natural 6.57 ct Unheated Octagon Sapphire, 11.48 × 9.7 × 5.44 mm. IGI certificate available. Ethically sourced, free insured shipping.

Shipping Information

Estimated Ship Date 2–3 business days
Free US Shipping On every order, any value
International Shipping Free on every order, any value
Secure Packaging Insured, discreet delivery

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$928.00

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.

Large Inventory

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Ethically Sourced from India

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