Find your birthstone in a moment. Enter your birth date or month and this calculator shows both the modern and the traditional birthstone for that month, along with the qualities each gem has long been associated with. It is a simple, enjoyable way to discover the stone tied to your time of birth.
Modern and Traditional Stones
Most months have two answers. The modern birthstone list is the one standardised by jewellers in the twentieth century and is what you will usually see in shops today, while the traditional stone reflects older associations that in some cases go back centuries. For some months the two agree, such as the ruby for July, and for others they differ, which is why the calculator shows both.
What Birthstones Mean
Each stone carries a cluster of symbolic meanings built up through folklore and custom. The garnet of January is linked with loyalty and protection, the emerald of May with rebirth and faithful love, and the sapphire of September with wisdom and calm. These meanings are cultural rather than proven, but they are part of why birthstones have stayed a popular and personal gift.
Using Your Birthstone
Birthstones make a thoughtful choice for jewellery, gifts and keepsakes precisely because they are tied to a person's month. Knowing both the modern and traditional stone gives you options, and the meanings can guide a gift toward a quality you want to celebrate. Take the symbolism as a pleasant tradition rather than a claim about the stone's effect.
How the Modern List Was Set
The list you see in jewellery shops today is younger than most people assume. In 1912 the National Association of Jewelers, meeting in Kansas, agreed a standard month-by-month list that the trade has used ever since, refining it only lightly in the decades after. Traditional birthstones are older and looser, gathered from folklore, biblical references and regional custom, which is why a month can carry one stone in a modern catalogue and a different one in an antique guide.
A Few Stones and Their Lore
Beyond the headline gems, each month has its own character. The amethyst of February was once thought to guard against overindulgence, the aquamarine of March was carried by sailors for safe passage, and the peridot of August was prized in ancient Egypt as a stone of light. April keeps the diamond, December offers turquoise or tanzanite, and the calculator pairs every month with both its modern and traditional choice so none of this lore is lost.
More Than One Tradition
Western birthstones are not the only system. Some people follow zodiac stones tied to the sun signs, and Ayurvedic and Vedic custom assigns gems by planet rather than by calendar month. These lists overlap in places and part ways in others, so if a stone you love sits in a different system, there's no harm in claiming it. The meanings are cultural rather than measured, which leaves room for personal choice.
Good to Know About Birthstones
What is my birthstone?
Your birthstone is the gem associated with your birth month. Enter your month and the calculator shows both the modern stone used by jewellers today and the older traditional stone, with their meanings.
Why are there two birthstones for some months?
The modern list was standardised by the jewellery trade in the twentieth century, while traditional stones reflect older custom. Where the two disagree, the calculator shows both so you can choose.
Do birthstone meanings have any basis?
The meanings come from folklore and cultural tradition rather than science. They are part of the charm of birthstones and are best enjoyed as symbolism rather than fact.
This tool is for entertainment and reflection only and has no scientific basis.
Related tools
Take it a step further with these divination calculators: Birth Flower Calculator, Human Design Bodygraph Calculator, Love Tarot Reading and Spirit Animal Calculator. Looking at a couple of them together rounds out the picture and adds useful context. Find the full set under divination calculators, or open all the calculators in one place.