Birthstone Finder
Enter your birth date below for three results at once: your modern (1912-list) birthstone, your older traditional birthstone where the two differ, and your zodiac sun sign's traditionally paired stones — each linking to its own full page.
We only use the month and day (in your browser, never sent anywhere) — the year only matters if you want to know your age, which this tool doesn't need.
Modern vs. traditional birthstones, briefly
Birthstone-by-month customs are much older than most people assume, but they were never fully standardized until relatively recently. Various European and American jewelry trade groups published competing lists through the 18th and 19th centuries, often disagreeing on which stone belonged to which month. In 1912, the predecessor to today's Jewelers of America convened to settle on one official list for the retail trade — the "modern" list still used on price tags and birthstone jewelry today. Several months (January and April among them) saw no real change, since one stone already dominated; others (June and December especially) saw a genuine substitution, which is why an older "traditional" stone still circulates alongside the modern one for those months.
Where the zodiac stone comes from
Your sun sign's traditionally paired stones are a separate system from birthstones entirely — they come from astrological tradition rather than the 1912 jewelers' list, and the two systems don't always agree even for people born in the same month. A December birthday, for instance, might fall under Sagittarius or Capricorn depending on the exact day, and each sign carries its own distinct set of traditionally associated stones described in more depth on GemGlow's zodiac crystal hub.
If you want a deeper personalized read on your specific sign — not just the stone pairing — GemGlow's sister site GetMyHoro covers full horoscope content, linked directly from your result above once you enter a date.
Frequently asked questions
Why do some months have two different birthstones?
The modern list dates to 1912, when the National Association of Jewelers (now Jewelers of America) standardized it for the retail trade; several months also carry an older traditional stone that predates it, sometimes by centuries, and jewelers never fully retired the older lists — so both are still in common use today.
Does this tool need my exact birth date, or just the month?
Modern and traditional birthstones are assigned by month only, so the month is all that matters for those two results. Your exact day is used for one additional result: your zodiac sun sign, since sign boundaries fall in the middle of most months rather than lining up with calendar months.
Why does the tool ask for a full date instead of just a month dropdown?
A birth month alone can't determine a zodiac sign, because every sign's date range starts and ends mid-month (for example, someone born November 1st is a Scorpio, while someone born November 25th is a Sagittarius) — the day is required to compute that third result accurately.
Is my birth date sent anywhere when I use this tool?
No. The date you enter is used only inside your browser to look up birthstone and zodiac data that's already loaded with the page — nothing is transmitted to a server or stored.