GRS GemResearch Swisslab AG is an independent gemological research laboratory specializing in determining the origins of, and generating authenticity reports for, rubies, sapphires, and emeralds as well as other important colored gems including spinel, tourmaline, and garnet.

Record Sale of Magnificent Pigeon’s Blood Ruby and Diamond Necklace by ETCETERA sold at Christie’s jewellery auction in Hong Kong with GRS Reports for 13 million US Dollars - A closer look to ruby values.

Updated GRS color scale with the new 'intense to vivid' and 'vivid to deep' grades. * Rubies with the colors 'intense to vivid red', 'vivid red', and 'vivid to deep red' that are reminiscent of GRS-Type "Pigeon's Blood" rubies but without strong fluorescence, will be …

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Description: Bask in the glow of this glorious 2.57-carat ruby from Burma (Myanmar), known to produce the most superlative rubies. Its lovely pure red color is certified as "red of strong saturation" by SSEF and "vivid red - pigeon's blood" by GRS, which is …

Specializing in natural ruby factories for more than 50 years • Quality Assurance: Handpicked rubies from top origins like Myanmar and Mozambique, showcasing captivating color and superior craftsmanship.

Description: Discover a masterpiece of nature: a 6.06-carat Burmese Ruby from the legendary Mogok mines. With its rectangular cushion shape, this gem mirrors the graceful geometry of a perfectly cut crystal. Its vivid red hue, tinged with subtle magenta undertones, is entirely natural—no enhancements whatsoever.

Learn how pigeon's blood ruby color grading standards have evolved and how to choose the best gemology labs for grading these stones.

Type 1 - GRS-type "pigeon blood" applies to all marble deposit ruby. They generally exhibit a medium-strong to strong fluorescence when exposed to UV light (365nm) due to their high chromium (Cr) concentration and low iron content (Fe).

On 1stDibs, you can find the most appropriate grs certified ruby for your needs in our varied inventory. Each design created in this style — which was crafted with great care and often made from Gold , 18k Gold and White Gold — can elevate any look.