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Fine-quality rubies are some of the most expensive gemstones, with record ruby prices over $1,000,000 per carat. However, rubies are also subjected to more treatments than almost any other gem. For this reason, ruby prices can range from a few hundred dollars a carat to thousands of dollars per carat. 11 … See more Ruby is gem-quality red corundum. The color comes from traces of chromium. All other color varieties of gem-quality corundum are referred to as sapphire. Most gemological authorities expect a medium to medium … See more Overall color can often, but not always, offer a clue to a ruby's origin. Stones from Myanmar tend to have purplish red colors. Thai stones tend to … See more Rubies have a long history of enhancement. Unless the seller specifically states the stone is unheated, you should assume that some kind of heat treatment has been used. Usually, high temperature heating … See more Lab-created ruby can be manufactured by several different methods, including flame fusion, the Czochralski process, flux, and hydrothermal. Corundum gemstones, both rubies and sapphires, were first synthesized in the late … See more WebSmall Raw Ruby Pieces, Rough Ruby, Genuine Uncut Ruby Crystal, July Birthstone, Healing Crystal, Bulk Raw Gemstone, Ruby003 ad vertisement by RawGemstone Ad vertisement … WebClick the “Ask About Me” button to view the contact information for the organization caring for me. small and fast brain waves are called