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Gemstone Encyclopedia August's Birthstones: The Dual Delights of Peridot & Spinel Hackmanite Gemstone: Properties, Meanings, Value & More July Birthstone: The Allure, Mystique & Glamour of the Ruby Ruby Gemstone: History, Uses, Properties & More June Birthstones: Pearl, Alexandrite & Moonstone Alexandrite Stone: Meaning, History, Properties, and Value May Birthstone: A Complete Guide to the Emerald Birthstone Emerald Gemstone: Value, History, Meanings and More April Birthstone: A Complete Guide + 4 Alternative Stones Diamond Gemstones: History, Meaning, Value & More