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Asterism on the surface of a blue star sapphire. A purple-pink star sapphire displaying asterism in a platinum ring.. An asterism (from Ancient Greek ἀστήρ (astḗr) 'star' and -ism) is a star-shaped concentration of light reflected or refracted from a gemstone.
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. [3]
National Museum of Natural History [3] DeLong Star Ruby: Burma: 1930 100.32 carats (20.064 g) American Museum of Natural History [4] Garrard's Red Ruby Burma: 40.63 carats (8.126 g) [5] Sunrise Ruby: 25.59 carats (5.118 g) [6] Carmen Lúcia Ruby: Burma: 1930s 23.1 carats (4.62 g) National Museum of Natural History [7] Elizabeth Taylor Ruby
Citrine “A powerful gemstone crystal in a range of deep yellows, oranges, and yellow-cream-white, the citrine gemstone is said to bring abundance and wealth into one’s life,” Salzer says.
Whether a gemstone is a natural stone or synthetic, the chemical, physical, and optical characteristics are the same: They are composed of the same mineral and are colored by the same trace materials, have the same hardness and density and strength, and show the same color spectrum, refractive index, and birefringence (if any). Lab-created ...
The ruby was discovered by Dubai-based FURA Gems in its mine in Mozambique on July 21, 2022. [2] [3] [4]Before its unveiling and cutting, Daniel Nyfeler, managing director of Gübelin Gem Lab, stated: "the Estrela de Fura ruby is likely to yield an intense, saturated red colour once fully and properly faceted with adequate proportions, is relatively free of eye-visible inclusions.