1.28 ct Oval Ruby, GRS, Siam Heated

1.28 ct Ruby, oval cut, from Siam. Heated, the long-established and stable treatment for rubies and sapphires, accepted across the trade. Thai (Siam) rubies are known for a deep red, a result of their higher iron content. GRS report GRS2022-120838 H. Measurements: 6.46 × 5.27 × 3.95 mm. Our grading: fine quality vivid red color (pb). Stock number CS-0866. Price on request: WhatsApp or email us about this stone. Viewings by appointment in Toronto, Hong Kong, Bangkok and Dubai.

The term pigeon’s blood in its colour grade is the trade’s name for the finest saturated, slightly bluish red in ruby. It is documented by GRS (GemResearch Swisslab), a Swiss laboratory widely used for coloured stones. Its length-to-width ratio is 1.23. A good size for a solitaire ring, a halo design or a pendant.

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Further reading: Reading a GRS Report: Pigeon's Blood, Royal Blue, Vivid and the Comments Line · Rubies, Sapphires and Emeralds: Origin, Treatment and Value