6.52 ct Square Cushion Blue Sapphire, GRS, Ceylon Unheated

6.52 ct Blue Sapphire, square cushion cut, from Ceylon. Unheated: the colour is as the stone formed, with no heat treatment. Sri Lanka (Ceylon) is known for bright, lively sapphires across the colour range, including padparadscha. GRS report GRS2026-018826. Measurements: 10.02 × 9.80 × 6.63 mm. Our grading: fine quality vivid (royal) blue. Stock number CS-0063. 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. Face-up it is almost exactly square. Large enough to anchor a statement ring or pendant.

More like this: Royal Blue Sapphires · Blue Sapphires · Ceylon Sapphires · Unheated Sapphires · Unheated Gemstones · Stone search

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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