- CategoryOxide mineral varietyFormula (repeating unit)aluminium oxide with chromium, Al₂O₃:Cr
Ruby - Wikipedia
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. Ruby is one of the traditional cardinal gems, alongside amethyst, sapphire, emerald, and diamond. The word ruby … See more
Factors affecting valueRubies, as with other gemstones, are graded using criteria known as the four Cs, namely color, cut, clarity and carat weight. Rubies are also evaluated on the basis of their geographic origin.
In the evalu… See more
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Ruby Gemstone | Ruby Stone - GIA
WEBLearn about ruby, the red variety of corundum, the most valuable colored stone. Find out its history, lore, quality factors, treatments, synthetics, and more.
Ruby: The gemstone Ruby information and pictures
WEBRuby is the red variety of the mineral Corundum, and is one of the most desirable and valuable gemstones. Learn about its color, hardness, luster, rarity, treatments, and varieties, such as Burmese Ruby, Star …
Ruby | Properties, Formation, Occurrence » Geology …
WEBJul 1, 2024 · Ruby is a red variety of the mineral corundum (Al2O3) that is valued as a precious gemstone. Learn about its properties, formation, occurrence, mining, and applications in this comprehensive article.
Ruby Value, Price, and Jewelry Information
WEBLearn about the quality factors, treatments, and origins of ruby, the red gemstone and July birthstone. Compare prices and see photos of different cuts, colors, and shapes of …
Ruby Description - GIA
WEB1 day ago · Ruby is a variety of the mineral corundum, which also includes sapphire. Learn how chromium, fluorescence, and marble deposits affect ruby's color and value.
What Is Ruby - Gemstone Facts and Information
WEBJul 1, 2024 · Ruby is the red variety of the mineral Corundum, to which Sapphire also belongs. In its purest form, Corundum is colourless - the iconic colour of Ruby actually comes from traces of chromium within the …
Ruby | Red, Pink, Corundum | Britannica
WEB4 days ago · Ruby is a transparent red variety of corundum, a mineral form of aluminum oxide. It is one of the most valued gemstones, with a pigeon-blood red colour and high refractivity, and is found in limited …
Ruby History and Lore - GIA
WEBRuby is one of the most historically significant colored stones. Rubies are mentioned four times in the Bible, in association with attributes like beauty and wisdom. In the ancient language of Sanskrit, ruby is called ratnaraj, …
Ruby: The Undisputed King of the Red Gemstones
WEBJul 1, 2013 · July’s mesmerizing birthstone was called “the king of precious stones” in ancient India. It remains a fitting title today. Like its sister gemstone sapphire, ruby is a variety of the mineral corundum. …
Ruby: Mineral information, data and localities. - mindat.org
WEBRuby is a red variety of corundum, a gemstone with a hardness of 9 and a trigonal crystal system. Learn about its formula, colour, pronunciation, synonyms, varieties, …
Ruby Gemstone: History, Uses, Properties & More - Gem Rock …
WEBMay 13, 2021 · As a corundum gem, ruby is made from aluminum oxide. This powerful gem nearly tops the Mohs mineral scale of hardness at a jaw-dropping 9. That makes …
Ruby - Gemological Institute of America
WEBThe most famous rubies are found in marble, a metamorphic rock. These have rich red color and usually glow a bright red under sunlight. The glow makes the red color even …
23 Interesting Ruby Facts: Everything You Need to Know - The …
WEBJul 12, 2019 · Learn the most important facts about rubies like where ruby is found, how it's formed, and how ruby was depicted throughout history.
Ruby Gemstone Overview | Learn About the Ruby - July's Birthstone
WEBThe ruby gemstone is the red variety of the mineral corundum, colored by the element chromium. Read an overview about the ruby, July's birthstone.
Science of Stones: Ruby - International Colored Gemstone …
WEBRubies are scientifically known as corundum, a rock-forming mineral and crystalline form of aluminium oxide which is two aluminium atoms and three oxygen atoms (Al2O3) in a …
Ruby Gemstone | Ruby Stone - GIA
WEBRuby is the most valuable variety of the corundum mineral species, which also includes sapphire. It is very important in colored stone market.
Ruby Meanings and Uses - Crystal Vaults
WEBRuby is red Corundum, an aluminum oxide mineral with chromium responsible for its rich, red color. The name comes from the Latin word rubeus, meaning “red,” and until 1800 …
Ruby Meaning and Properties - Beadage
WEBRuby as a Gemstone. A fiery red gemstone that comes from the corundum mineral (sapphires come from the same mineral). Corundum is considered one of the hardest …
Ruby: Meaning, Properties, and Benefits You Should Know - All …
WEBRuby is red-colored Corundum that gets its color from chromium. It can also show many other colors, as it exists with scores of minerals like Apatite, Pyrite, Muscovite, …
Ruby Meaning, Healing Properties and Uses - The Crystal Almanac
WEBRuby is a variety of corundum, which is an aluminum oxide mineral. This precious gemstone derives its enchanting deep red color from traces of chromium in its crystal …
Ruby Quality Factors | The Color Range of Ruby - GIA
WEBIntersecting needles of the mineral rutile create a common ruby inclusion called silk. When they are intact, they prove the ruby was not heat-treated at very high …
Ruby Meanings and Crystal Properties - The Crystal Council
WEBRuby is a an extremely hard aluminum oxide (called corundum) with a hexagonal crystal system. It is the red variety of corundum as well as one of the primary varieties, along …
'World first' ruby grown in jewellery setting in lab - BBC News
WEBSep 24, 2024 · To grow the gem, Ms Boons started with a ruby "seed" taken from waste gemstone offcuts. She placed the fragment into a platinum setting, like a ring, and then …
Full-size ruby grown in platinum ring using gem waste in a world-first
WEB3 days ago · UWE Bristol. Sofie Boons, a lecturer from UWE Bristol has developed a chemical technique that lets a full-size ruby grow in situ, in a platinum ring. She has …
