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[36] [full citation needed] Amethyst is considered the birthstone of February. [37] In the Middle Ages, it was considered a symbol of royalty and used to decorate English regalia. [ 37 ] In the Old World , amethyst was considered one of the cardinal gems , in that it was one of the five gemstones considered precious above all others, until ...
Though it may be February's birthstone, anyone can wear this gem. The stone, which comes in range of purples from the softest of lilacs to bold indigo, is imbued with a storied history around some ...
The American Gem Trade Association added tanzanite as a December birthstone in 2002. [5] In 2016, the American Gem Trade Association and Jewelers of America added spinel as an additional birthstone for August. [6] Britain's National Association of Goldsmiths created its own standardized list of birthstones in 1937. [7]
Untreated tanzanite is a trichroic gemstone, meaning that light that enters this anisotropic crystal gets refracted on different paths, with different colour absorption on each of the three optical axes. As a result of this phenomenon, a multitude of colors have been observed in various specimens: shades of purple, violet, indigo, blue, cyan ...
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Zircon is the most diverse of December's birthstones since it comes in a broader range of colors. This includes red, orange, yellow, brown, green and blue . Its name's origins have been debated by ...