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Há 5 dias · Peridot Description. While the 64.57-carat cut peridot is magnificent, it is overshadowed by the amazing. 7.9-cm tall crystal. Both are from Sappat, Kohistan, Pakistan. - Jeffrey Scovil. Gem miners find peridot as irregular nodules (rounded rocks with peridot crystals inside) in some lava flows in the United States, China, and Vietnam and, very ...
Há 4 dias · Gems & Gemology is redesigned, ... Diamonds and gemstones are weighed in metric carats: one carat is equal to 0.2 grams, about the weight of a paperclip.
Há 5 dias · JADEITE. The lustrous green of Jadeite makes it one of the most coveted gemstones in the world. Its hue ranges from a pale, translucent green to a deep shade that resembles that of an Emerald. However, Jadeite is treasured for its exceptional smoothness and glowy appearance as well as its colour. Historically, Jadeite has been highly prized in ...
Há 3 dias · Diamonds and other gemstones are weighed in metric carats: one carat is equal to 0.2 grams, about the same weight as a paperclip. (Don’t confuse carat with karat, as in “18K gold,” which refers to gold purity.) Just as a dollar is divided into 100 pennies, a carat is divided into 100 points. For example, a 50-point diamond weighs 0.50 carats.
Há 6 dias · The gemstone refractive index, commonly abbreviated as RI, measures the difference between the speed of light in air and the speed of light in a stone. For example, the refractive index of a diamond is 2.417 – 2.419, which means that the speed of light in a diamond is 2.42 times slower than in air. Every gemstone has a unique refractive index ...
11 de mai. de 2024 · Expertise. Opal Stone Perlman's expertise in gemology is evident in her ability to identify, appraise, cut, and polish gemstones. She has a deep understanding of the different types of gemstones and their properties, and she is able to use this knowledge to help her clients find the perfect gemstone for their needs.
23 de mai. de 2024 · TANZANITE. Tanzanite is an excellent gemstone to buy this summer, and is celebrated worldwide for its deep blue-violet hues. Its unique trichroism means that it can display different colours when viewed from different angles, which adds a mesmerising depth to any piece of Tanzanite jewellery. Its single-location source adds to its rarity and ...
