3.01 ct Cushion Ruby, GRS, Siam Heated

Name: 3.01 ct Cushion Ruby, GRS, Siam Heated video
Uploaded: 2026-11-11T14:08:41.282Z
Description: “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 1.10, close to square. A centre stone of real presence for a ring or pendant.

3.01 ct Ruby, cushion 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 GRS2026-070187. Measurements: 8.63 × 7.88 × 4.60 mm. Our grading: fine quality vivid red. Stock number CS-1300. 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 1.10, close to square. A centre stone of real presence for a ring or pendant.

More like this: Rubies · Stone search

Similar stones: 2.60 ct Oval Ruby, GRS, Burma Heated · 2.64 ct Pear Ruby, GRS, Tanzania Unheated · 2.71 ct Oval Ruby, GRS, Burma Unheated · 3.00 ct Cushion Ruby, GRS, Burma Unheated · 3.01 ct Oval Ruby, GRS, Burma Unheated · 3.03 ct Oval Ruby, GRS, Burma Unheated · 3.06 ct Oval Ruby, GRS, Siam Unheated · 3.10 ct Oval Ruby, GRS, Burma Unheated

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