5.37 ct Cushion Blue Sapphire, GRS, Sri Lanka Heated

5.37 ct Blue Sapphire, cushion cut, from Sri Lanka. 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 GRS2022-012417. Measurements: 9.73 × 8.44 × 6.76 mm. Our grading: gem quality royal blue. Stock number CS-0036. 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.

Royal blue, in its colour grade, describes a deep, rich, velvety blue, among the most valued sapphire colours. Its laboratory report is from GRS (GemResearch Swisslab), a Swiss laboratory widely used for coloured stones. Its length-to-width ratio is 1.15. 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