4.24 ct Oval Blue Sapphire, GRS, Ceylon Heated

4.24 ct Blue Sapphire, oval cut, from Ceylon. Heated, the long-established and stable treatment for rubies and sapphires, accepted across the trade. Sri Lanka (Ceylon) is known for bright, lively sapphires across the colour range, including padparadscha. GRS report GRS2026-019086. Measurements: 10.08 × 8.92 × 6.03 mm. Our grading: gem quality intense blue. Stock number CS-0025. The video on this page was filmed in our office, unedited and unfiltered. Approved trade buyers can sign in on this page for pricing, or WhatsApp or email us about this stone. Viewings by appointment in Toronto, Hong Kong, Bangkok and Dubai.

“Intense” in its colour grade indicates strong, well-saturated colour. Its laboratory report is from GRS (GemResearch Swisslab), a Swiss laboratory widely used for coloured stones. Its length-to-width ratio is 1.13, close to square. Large enough to anchor a statement ring or pendant.

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Further reading: Reading a GRS Report: Pigeon's Blood, Royal Blue, Vivid and the Comments Line · Heated vs Unheated Sapphire: What the Difference Means for Price