18.09 ct Oval Yellow Sapphire, GRS, Ceylon Unheated

18.09 ct Yellow Sapphire, oval 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 GRS2025-120109 (8 Jan 2026) - Color Type 3a. Measurements: 17.80 × 13.78 × 8.06 mm. Our grading: gem quality vivid yellow. Stock number CS-0310. 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.

“Vivid” in its colour grade marks the most saturated level of colour. It is documented by GRS (GemResearch Swisslab), a Swiss laboratory widely used for coloured stones. Its length-to-width ratio is 1.29. A collector’s size, suited to a signature ring, pendant or a stone kept loose.

More like this: Yellow Sapphires · Ceylon Sapphires · Unheated Sapphires · Fancy 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