10.27 ct Oval Blue Sapphire, GRS, Thailand Unheated

10.27 ct Blue Sapphire, oval cut, from Thailand. Unheated: the colour is as the stone formed, with no heat treatment. GRS report GRS2023-050812. Measurements: 15.69 × 10.56 × 6.87 mm. Our grading: gem quality vivid (royal) blue. Stock number CS-0064. 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. It is documented by GRS (GemResearch Swisslab), a Swiss laboratory widely used for coloured stones. Its length-to-width ratio is 1.49. A collector’s size, suited to a signature ring, pendant or a stone kept loose.

More like this: Royal Blue Sapphires · Blue 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