Birthstone Calculator
Enter a date of birth to find the traditional Western birthstone for that month.
About this calculator
This birthstone calculator looks up the modern Western birthstone list — the set popularised by jewellers' associations in the early 20th century and still the most widely used today.
Some months have more than one historically recognised stone; this tool shows the most commonly cited primary stone for quick reference.
How it works
Enter the date of birth
Only the birth month is used.
Calculate
The month is matched to its traditional birthstone.
See the result
View the birthstone name.
Frequently asked questions
Are birthstones the same in every country?
No — traditional lists vary between cultures and eras; this tool uses the modern Western list most common in jewellery retail.
Why do some months have alternate stones?
Historical lists from different centuries and countries didn't always agree, so several months have widely recognised alternates in addition to the primary stone shown here.