What had been U.S birthstone 15th-20th century when 2013 the thing had been amethyst?
Month 15th- 20th century U.S. (1912) U.S. (2013) Britain (2013) Hindu
Birthstones
17891889
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2-17891889-1
Birthstones by cultures
Birthstones by cultures
January garnet garnet garnet garnet serpent stone
February amethyst , hyacinth , pearl amethyst amethyst amethyst chandrakanta
March heliotrope , jasper heliotrope , aquamarine aquamarine , heliotrope aquamarine , heliotrope Gold Siva-linga
April diamond , sapphire diamond diamond diamond , rock crystal diamond
May emerald , agate emerald emerald emerald , chrysoprase emerald
June cat's eye , turquoise , agate pearl , moonstone pearl , moonstone , alexandrite pearl , moonstone pearl
July turquoise , onyx ruby ruby ruby , carnelian sapphire
August sardonyx , carnelian , moonstone , topaz sardonyx , peridot peridot peridot , sardonyx ruby
September chrysolite sapphire sapphire sapphire , lapis lazuli zircon
October opal , aquamarine opal , tourmaline opal , tourmaline opal coral
November topaz , pearl topaz topaz , citrine topaz , citrine cat's-eye
December heliotrope , ruby turquoise , lapis lazuli turquoise , zircon , tanzanite tanzanite , turquoise topaz
SELECT 15th- 20th century FROM table WHERE U.S. (2013) = amethyst
amethyst