Birthstone Calculator
Find the modern birthstone and birth flower for any birth month, with a full month-by-month reference chart.
How it works
birthstone and birth flower = the traditional modern-list assignment for the birth month (a fixed lookup)
Birthstones and birth flowers are cultural traditions with fixed month assignments. This calculator uses the modern birthstone list standardized by the US jewelry industry, plus the commonly cited birth flower for each month. Some months have more than one accepted stone, so an alternate is shown where one is widely recognized.
Worked example
September’s modern birthstone is the blue Sapphire, with Lapis lazuli as a common alternate, and its birth flower is the Aster — so a September baby’s traditional pairing is Sapphire and Aster.
Frequently asked questions
Why do some lists show different stones?
There are several traditions — modern, traditional and mystical — and they disagree for some months. This uses the modern list; the alternate shown covers the most common second choice.
Do birthstones have real powers?
No — the meanings attached to them are folklore, offered here for fun. The month-to-stone assignment itself is simply a well-established convention.
What is a birth flower?
Like birthstones, each month has a traditionally associated flower (for example, June’s is the rose). It is a decorative custom often used for gifts and tattoos.
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This calculator is for educational purposes. Double-check important results before acting on them.