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Ruby is a pinkish red to blood-red colored gemstone, a variety of the mineral corundum (aluminium oxide). Ruby is one of the most popular traditional jewelry gems and is very durable. Other varieties of gem-quality corundum are called sapphires .
Decades ago, a group of Millwood students vanished after a collapse in the cave they were exploring. Years later, they show up in town, having not aged a day…and with an unusual thirst they'll ...
May 5, 2024 · Rubies are red precious gemstones formed from corundum, a crystallized form of aluminum oxide. Ruby is known for its high rarity and value, its substantial mineral hardness of 9 out of 10 on the Mohs scale, and for being the birthstone for July.
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 dark-red color tone in a ruby. Stones lighter than this are called pink sapphire.
Sep 4, 2023 · The ruby’s red color comes from trace amounts of the element chromium, which replace aluminum in the mineral and change its color. When corundum is red, we call it ruby. When it’s any other color, such as blue, yellow, or pink, we call it sapphire.
High-quality, untreated Burmese rubies with a rich, red color are among the most valuable gemstones in the world and can command prices even higher than diamonds of similar size. Rubies are often considered a valuable investment, particularly when they exhibit exceptional color, clarity, and size.
Intense Red Glow. Fine ruby glows with intense red in sunlight thanks to red fluorescence, which intensifies its red color.
