4.21 Carat Natural Untreated Cornflower Blue Sapphire Oval

• SKU: JRO-P54864042
• Sapphire
• Oval

• Natural
• Unheated / No Heat

Carat Weight

4.21 ct

Shape

Oval

Dimensions

11.59 x 8.28 x 4.48 mm

Treatment

Unheated / No Heat

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Includes IGI Certificate (+$100.00)

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4.21 ct natural oval-cut Sapphire, showing a cool, saturated tone that shifts subtly between daylight and incandescent light. Cut to 11.59 x 8.28 x 4.48 mm, the proportions were chosen to balance color and brilliance rather than maximize weight alone. This stone is untreated — no heat, no fillers, exactly as it was mined. With a hardness of 9 on the Mohs scale, the same durability corundum is known for in daily wear.

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 .

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