The 9 Levels of Rubies Explained in 11 Minutes

The nine tiers of ruby color explained, from the pinkish red stones in chain-store jewelry to unheated Burmese pigeon's blood rubies that sell for over a million dollars per carat. This video breaks down what separates each grade, covering the chemistry of chromium and iron, the role of origin, the impact of heat treatment, and why a single discovery in Mozambique in 2009 reshaped a market that Burma had dominated for a thousand years. Every tier is tied to a specific cause, whether it's iron content in the host rock, the alignment of microscopic rutile needles, or the chemical signature labs use to detect treatment. What's covered in this video: Why ruby is just the red variety of corundum and how Swiss labs like GRS, Gübelin, and SSEF have spent thirty years arguing over the pigeon's blood designation. Pinkish red rubies, the lightest and most common tier, where chromium replaces aluminum in the corundum lattice and most chain-store stones actually sit. Brownish red rubies from Indian deposits in Mysore and Orissa, including the 2,475 carat Rajaratna Ruby, the largest known ruby in the world. Purplish red Siamese rubies from Thailand and Cambodia that the European trade handled for centuries through cutting centers in Bangkok. Plain red rubies from Madagascar and lower-tier Mozambique production, where chemistry balances out and clean five-carat stones can clear thirty thousand dollars. Intense red rubies where the chromium-to-iron ratio crosses one, including Elizabeth Taylor's 8.24 carat Van Cleef and Arpels ring that Richard Burton gave her in 1968, which sold at Christie's in 2011 for 4.2 million dollars. Vivid red rubies that qualify for pigeon's blood, and how Gemfields' Montepuez Ruby Mining operation in Mozambique, discovered by Suleman Hassan in April 2009, produced the 55.22 carat Estrela de Fura that sold at Sotheby's for 34.8 million dollars in June 2023. Burmese pigeon's blood rubies from the Mogok and Mong Hsu valleys, including the 25.59 carat Sunrise Ruby mounted by Cartier that sold for 30.4 million dollars and set the per-carat auction record at 1.19 million dollars. Star rubies in pigeon's blood color, including the 138.7 carat Rosser Reeves Star Ruby donated to the Smithsonian in 1965. Unheated Burmese pigeon's blood rubies at size, the top of the ladder, including the 23.10 carat Carmen Lucia Ruby donated to the Smithsonian by Dr. Peter Buck in 2004. How heat treatment, beryllium diffusion, and lead-glass filling are detected by modern labs, and why roughly 90 percent of commercial rubies are heated. Mentioned in this video: corundum, chromium, iron, pigeon's blood, GRS, GemResearch Swisslab, Gübelin Gem Lab, SSEF, Swiss Foundation for Gemstone Research, GIA, Gemological Institute of America, Mohs hardness scale, Mysore, Orissa, India, Rajaratna Ruby, Thailand, Cambodia, Vietnam, Bangkok, Siamese ruby, Madagascar, Mozambique, Burma, Myanmar, Mogok, Mong Hsu, Sri Lanka, Elizabeth Taylor, Van Cleef and Arpels, Richard Burton, Christie's, Sotheby's, Suleman Hassan, Montepuez Ruby Mining, Gemfields, Estrela de Fura, Fura Gems, Graff Ruby, Sunrise Ruby, Cartier, Rosser Reeves Star Ruby, Smithsonian, Carmen Lucia Ruby, Dr. Peter Buck, rutile, cabochon, beryllium diffusion, lead-glass filling, heat treatment, fluorescence, chromium-to-iron ratio. Chapters: 0:00 Intro 0:49 Level 1: Pinkish Red 2:18 Level 2: Brownish Red 2:57 Level 3: Purplish Red Siamese 3:42 Level 4: Plain Red 4:26 Level 5: Intense Red 5:31 Level 6: Vivid Red Pigeon's Blood 7:06 Level 7: Burmese Pigeon's Blood 8:16 Level 8: Star Rubies 9:09 Level 9: Unheated Burmese At Size 10:24 The Nine Tiers Recap