Birthstones.

Birthstones first appeared in 1AD in the area what is now known as modern day Poland

from there the dedicating of gemstones to a month of the year spread throughout the rest of Europe.

January	Garnet
February	Amethyst
March	Aquamarine
April	Diamond
May	Emerald
June	Pearl
July	Ruby
August	Peridot
September	Sapphire
October	Opal
November	Topaz
December	Turquoise