- Birthstones
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▪ TableBirthstonesmonth traditional gemstone 20th-century expansion synthetic supplement: trade name material of synthetic stoneJanuary garnet garnet dark red synthetic corundumFebruary amethyst amethyst purple synthetic corundumMarch bloodstone aquamarine aquamarine light blue synthetic spinelApril diamond white sapphire colourless synthetic spinel or corundumMay emerald emerald synthetic emerald or synthetic green spinelJune pearl alexandrite cultured pearl, alexandrite changeable synthetic corundum (synthetic spinel is rare)July ruby ruby red synthetic corundumAugust sardonyx peridot peridot green synthetic spinelSeptember sapphire sapphire blue synthetic spinel or corundumOctober opal tourmaline (pink or green) rozircon pink synthetic corundum or spinelDecember turquoise zircon zircon medium blue synthetic spinelSee as table:
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Universalium. 2010.