Birthstones by Month: The Complete Chart With Durability Notes

Birthstone shopping runs on a lovely premise: everyone has a stone, and gifting it proves you paid attention. What the gift-shop chart never mentions is that the stones were dealt unevenly. A July baby gets ruby — 9 on the Mohs scale, effectively indestructible in daily wear. An October baby gets opal — a hydrated, porous stone that can craze if it dries out or takes one hard knock. Same tradition, wildly different lifespan.

This guide gives you the complete modern birthstone chart, then adds the column that actually matters once the wrapping paper is off: how hard each stone is, whether it tolerates daily wear, and what to buy instead when your month drew a fragile one. For the symbolism and folklore behind each stone, our gemstone meanings guide covers that side of the story.

Where the Official List Comes From

Pairing stones with months is genuinely old — the tradition is usually traced to the twelve stones of the biblical breastplate of Aaron, later mapped onto the zodiac and then the calendar. But the tidy chart printed in every jewelry store is much younger: it was standardized in 1912 by the American National Association of Jewelers, largely to give retailers a clean, sellable list. It has been amended only twice since — tanzanite was added for December in 2002, and spinel joined peridot for August in 2016, the first change in over a century.

Two practical consequences follow. Several months now carry two or even three official stones, which is a gift in itself — you can choose the tougher one. And because the list is a trade convention rather than ancient law, choosing a durable alternative within your month is completely legitimate.

The Complete Chart, With Durability Notes

The table uses the modern list — the stones most retailers mean when they say "birthstone." Mohs measures scratch resistance on a 1–10 scale; anything under 7 slowly dulls from ordinary household dust, which is mostly quartz.

How to Read the Durability Columns

Mohs hardness answers one question: how well does a surface resist scratches? Two hidden factors decide the rest:

• Toughness — resistance to chipping and breaking. Emerald sits near 8 on the scale but is usually internally fractured and oiled, so a knock hurts it far more than a scratch would. Diamond at 10 has perfect cleavage and can split along a plane on a sharp edge hit.
• Stability — resistance to water, heat, and chemicals. Opal contains water and can craze when it dries; pearls are organic calcium carbonate and slowly dissolve under acids as mild as perfume and sweat.

For the full ranked explanation of which stones survive a never-off ring, see the best gemstones for everyday wear — it sorts the same minerals into daily-wear tiers.

If Your Month Got a Fragile Stone

June, October, and December drew the short straws — but each has an escape hatch built into the official list itself:

• June: skip the pearl ring. Moonstone is prettier worn as a pendant anyway, and lab-grown alexandrite — the same chrysoberyl mineral at 8.5 Mohs — gives June a genuinely ring-worthy stone at a fraction of natural alexandrite's price.
• October: tourmaline shares the month with opal and is the one to put in a ring. Keep opal for pendants and earrings, where it lives happily for decades.
• December: turquoise and tanzanite are both "sometimes" stones — porous or brittle. Blue zircon, December's third and oldest option, is the durable pick, though it is hard rather than tough, so a low protective setting earns its keep.

And if the fragile stone is non-negotiable: choose a low-profile bezel setting, rotate the piece rather than wearing it daily, and keep it far from ultrasonic cleaners. Our gemstone directory lists the safe cleaning method for each mineral.

Budget Alternatives That Keep the Meaning

The alternatives column hides two different things, and honest sellers separate them:

• Lab-grown versions — lab diamond, ruby, sapphire, emerald, and alexandrite — are the same mineral grown in a furnace instead of the ground: same hardness, same chemistry, typically far lower prices. They are real birthstones in every physical sense.
• Look-alike species — spinel for ruby, topaz for aquamarine, garnet for ruby red — are different minerals in the same color family. Often nearly as durable and much cheaper, but they should be labeled as what they are.

The one thing to avoid is glass or "crystal" sold as a birthstone. It scratches within weeks and shares nothing with the tradition but color.

A Short Gifting Checklist

• Match stone to jewelry type. Rings take the most abuse, then bracelets; pendants and earrings barely wear at all — the safe harbor for opal, pearl, and turquoise.
• Ask how the recipient wears jewelry. A "never takes it off" person needs 7.5 Mohs or better, full stop.
• For soft stones, choose a bezel or halo setting and keep the profile low — the girdle is the chip-prone edge.
• Clean by the stone, not the metal. The care and cleaning protocol breaks down which stones can take a soak and which cannot.

The chart is the easy part. Picking the version of the stone that survives the recipient's actual life is the real gift.

— Simply Jems Editorial Studio, Canadian artisan roots since 2014.