Corundum is the second hardest mineral on earth after diamonds, with a good resistance to chipping, and strong color stability. In terms of properties, there are no differences between the different varieties of corundum. Especially the famed Burmese Rubies of Myanmar. Poor natural formation of most rubies is the reason the astronomical increase in price for large sizes of any quality. This makes it difficult to grow to large sizes, and normally grows very shallowly too. Chromium does not mix with the corundum as well as other elements during formation. The biggest difference between ruby gemstones and other varieties of corundum is they usually do not grow as large. All these colors are otherwise called fancy color sapphires, including colorless sapphires. Ruby variety corundum is colored only by chromium, which is a rare element.Ĭorundum can come in many other colors too, like velvety blues, sunny yellows, and any other color except emerald green. Rubies are specifically the red variety of corundum. Rubies from Sri Lanka (formerly Ceylon).Differences Between Diamonds and Corundum.Differences Between Rubies and Other Gems.Calculating the Cost of a Ruby Engagement Ring.There is a rainbow of Corundum waiting for you. This unique wearability factor, combined with their rarity and brilliant colors make rubies and sapphires some of the most valuable gemstones. Because rubies and sapphires are so hard and resistant to scratching, they make great choices for all types of jewelry exposed to everyday wear. On the Mohs scale (gemstone hardness scale), Corundum has a hardness of 9, second only to diamond with a hardness of 10. The scientific definition of hardness in gemstones refers to its ability to resist scratching, and nothing more. The word “hardness” in gemology differs considerably from its everyday usage. The hardness of a gemstone is a very misunderstood property.
These little beauties, referred to as “Yogo Sapphires,” have come across my desk many times. While Rubies and Sapphires from Sri Lanka and Myanmar often appeal to those with an exotic nature, the Vortex mine in Montana, is a great American source of Sapphires, which it produces using green mining techniques. Are There Sapphire and Rubies born in the USA? You betcha It is now legal to import all gemstones, including ruby and jadeite, from Myanmar. On October 7th, 2016, President Obama signed an Executive Order, effectively removing all sanctions on the importation of gemstones from Myanmar. At one time importing gems from Myanmar was illegal due to human rights abuses. Ceylon sapphires come from Ceylon (even though the country is now known as called Sri Lanka).īurmese stones originate from…you guessed it: Burma, now called Myanmar. Rubies and sapphires can also be categorized by their origin.
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