6.43 Carat Natural Untreated Ruby Cushion IGI Certified

SKU: JRO-TR643
Ruby
Cushion

17% OFF

Natural
Unheated / No Heat
IGI Certified

Carat Weight: 6.43 ct
Shape: Cushion
Dimensions: 10.42 x 9.26 x 6.53 mm
Treatment: Unheated / No Heat

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Why This Stone?

Natural Ruby
No heat / untreated
6.43 carats
Cushion
Transparent
IGI certified
Ships Internationally

This 6.43 carat cushion-cut Ruby shows a rich, saturated red that draws the eye even under low light. Cut to 10.42 x 9.26 x 6.53 mm, it's a natural stone, not a lab-grown substitute. This stone is untreated — no heat, no fillers, exactly as it was mined. IGI certification is included. Because it's sold loose, it can go into a custom ring, pendant, or earring setting — or simply stay in a collection as-is.

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Product Details

Specifications for 6.43 Carat Natural Untreated Ruby – Cushion
SKU	JRO-TR643
Gemstone Type	Ruby
Shape	Cushion
Variety	Ruby
Carat Weight	6.43 ct
Dimensions	10.42 x 9.26 x 6.53 mm
Treatment	Unheated / No Heat
Transparency	Transparent
Certificate	IGI

About This Gemstone

Genuine 6.43 ct Unheated / No Heat Cushion Ruby, IGI certified. Ethically sourced and ready to ship — Stone #1521.

Certification

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

Shipping Information

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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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