With time people started relating gemstones with zodiac signs or months of the year and those who were born in that month were believed to have qualities resembling that of the birthstone or gemstone that was linked to that particular month.
At present the official birthstone list from American National Association of Jewelers, Jewelers of America, has been officially adopted in 1912.
The modern birthstones & their respective birth months are:
- Garnet - January
- Amethyst - February
- Aquamarine - March
- Diamond - April
- Emerald - May
- Pearl - June
- Ruby - July
- Peridot - August
- Sapphire - September
- Opal - October
- Yellow Topaz - November
- Blue Topaz - December