Zodiac Birthstones by Sign: The Stone (and Ring) for All 12

A zodiac birthstone is the gem that astrological tradition attaches to your sun sign — bloodstone for Aries, sapphire for Taurus, topaz for Sagittarius. It is a different idea from the calendar-month birthstone on the gift-shop chart, and unlike that calendar list it was never standardized by anybody. This guide gives all 12 signs, shows you exactly where the historical lists contradict each other, and pairs each sign with the solid .925 sterling silver piece we would hand you across the counter.

Zodiac Birthstone vs. Monthly Birthstone

Our nine-minute documentary on zodiac birthstones: where the popular chart actually comes from, what the 1913 book those charts lean on really says, and how to pick a stone anyway.

Two lists are in circulation and they get mixed up constantly. The monthly birthstone follows the calendar, and the American version has a paper trail: a national jewelers' trade association — the body that became today's Jewelers of America — adopted a standard twelve-month list at its Kansas City convention in August 1912. That list has been amended three times since: alexandrite, citrine, tourmaline and zircon in 1952, tanzanite for December in 2002, and spinel alongside peridot for August in 2016 — the version our guide to birthstones by month works from.

The zodiac list has no equivalent paper trail. It predates that 1912 standard, but so do the month lists — Kunz traces month-by-month gem ordering back to the early Christian centuries. It runs on your sun sign, the roughly 30-day window you were born under, and it comes down to us through medieval lapidaries and astrological gem lore rather than through a trade body that took a vote. Nobody ever reconciled the versions.

You can watch them collide in one 1913 book. George Frederick Kunz, then Tiffany & Co.'s gem buyer, printed an English zodiac list in The Curious Lore of Precious Stones — Aries bloodstone, Taurus sapphire, Cancer emerald, Leo onyx, Scorpio beryl, Capricorn ruby — and then, immediately below it, an old Spanish list he thought preserved Arab tradition, which gives Aries crystal, Cancer agate and beryl, Leo topaz, Scorpio garnet, Capricorn chalcedony. Two lists, one book, back to back, sharing a stone on not one of the eleven signs the Spanish list actually fills in.

All 12 Zodiac Birthstones at a Glance

Three columns, three different answers to the same question. The first is the zodiac birthstone chart in general circulation today. The second and third are the two lists George Frederick Kunz recorded in 1913, printed one after the other in the same book — which is why they are useful: the disagreement is right there in the source. Where they agree, you are on solid ground; where they don't, pick on color.

A note on the dates: Kunz's own ranges run a day or two off the modern ones (his Aries is March 21 to April 20), because sign boundaries shift slightly year to year. His Spanish list simply stops at Pisces with no stone given, which tells you something about how carefully these lists were kept. Below, each sign gets the piece we would actually put in your hand — and where the center stone is a simulant rather than a mined gem, we say so in that paragraph rather than burying it.

Fire Signs: Aries, Leo, Sagittarius

Fire signs land on the loud end of the color range — reds that announce themselves, gold that catches a room, the blue-green a rider sets against the sky. Their birthstones follow the same logic. Aries, Leo and Sagittarius all land on stones we can actually put in a setting.

Aries — the red stones

Bloodstone is the one assignment for Aries that both the modern chart and Kunz's English list agree on. Its reputation as a soldier's stone is later folklore rather than documented Roman practice — Pliny the Elder, who describes heliotrope in his Natural History, records that magicians claimed it made the wearer invisible — and says nothing about soldiers carrying it into battle.

We don't cut bloodstone, so the honest substitute is a deep red garnet. The Garnet Claw Gothic Ring sets a garnet-colored cubic zirconia between two textured talons at a protected depth, in 17 grams of silver. If you want the mined stone instead, the 21-carat natural garnet ring is a cushion cut at 17mm × 19mm with 36 natural white sapphires around it.

Telling a cut garnet from a garnet-colored simulant is harder than most people expect once both are set — our garnet meaning guide walks through what actually separates them.

Leo — ruby, the Sun's stone

Leo is ruled by the Sun in Western astrology, and ruby is the Sun's gem in the Vedic navaratna — the nine-gem planetary talisman of Indian astrology, one stone per celestial body, ruby at the center. That is a specific tradition, not a universal rule — Kunz's European planetary list assigns the Sun jacinth and chrysolite and hands ruby to Mars, and his zodiac list gives Leo onyx outright. The Ruby Bishop Ring carries a 20-carat oval center at 18 × 20mm, ringed by 36 CZ accents, with raised Latin crosses standing in relief on both sides of the shank. The center is a lab-grown ruby, not a mined one; at 24 grams it sits like regalia.

Sagittarius — turquoise, the traveler's stone

Turquoise earns the road association honestly. Turkish and Persian horsemen fixed it to their horses' bridles and frontlets as a charm against falls — the practice Kunz records, and the origin of turquoise's later reputation for protecting against falls of any kind. In the American Southwest the associations are different and separately documented: Navajo, Zuni and Pueblo traditions tie turquoise to sky, water and protection — the pairing the Museum of Indian Arts and Culture built a whole exhibition around.

The Turquoise Eagle Ring bezel-sets a genuine turquoise cabochon, 23mm × 19mm, with natural matrix veining. One handling note: turquoise is Mohs 5 to 6, the softest stone on this page. It sits flat and level in its frame here, which helps, but it is not the ring to wear through gloves and gearboxes.

Earth Signs: Taurus, Virgo, Capricorn

Earth signs pull toward stones with weight and depth — greens that read as grown rather than dyed, blacks that hold a line. Two of these three birthstones changed hands between the lists. The three below cover both ends of our stone sourcing, which makes them a useful comparison.

Taurus — emerald green

The modern chart leads with emerald and keeps sapphire as a second option; Kunz's English list gives Taurus sapphire outright; the old Spanish list says ruby and diamond. Green is the association that stuck, and it is the one most Taurus buyers ask for. The Green Dragon Claw Ring holds a 35-carat step-cut green cubic zirconia at 15mm × 20mm, gripped at the corners by four scaled talons, in 26 grams of oxidized silver. The emerald cut is doing real work here — step facets read as separate planes and shift the green from forest to near-black as your hand turns, which a brilliant cut at this size would not do.

Virgo — peridot, the evening emerald

Peridot has been mistaken for emerald for most of recorded history, which is how it picked up the "evening emerald" nickname. The confusion is documented: the 200-carat gems on the Shrine of the Three Kings in Cologne Cathedral were taken for emeralds for centuries and are actually peridots, and some historians suspect Cleopatra's famous emeralds were the same stone. The Egyptians who mined it on the Red Sea island of Zabargad called it the gem of the sun.

The Gold Peridot Bishop Ring uses a mined oval peridot inside a clear CZ halo — the stone shifts olive under daylight toward a purer green under lamps, and no two of ours come out the same shade. That variation is characteristic of a mined stone rather than proof of one — only gemological testing settles origin, which is why the product page states it outright.

Capricorn — garnet, or the black it wears better

Garnet is Capricorn's stone on the modern chart. Kunz's English list gives Capricorn ruby and the Spanish list gives chalcedony, so the garnet association is the newest of the three — it arrives via January's calendar stone. In practice the Capricorn buyers we deal with skip all of it and go black. The Black Onyx Phoenix Ring sets a polished onyx cabochon at the breast of a full-body phoenix, 28 grams of silver across a 22mm × 35mm face, with the recesses oxidized so the feather carving keeps its depth.

Air Signs: Gemini, Libra, Aquarius

Air signs get the birthstones that change with the light. Gemini and Aquarius hold mined gems here while Libra does not, which is worth knowing before comparing the three side by side.

Gemini — citrine and the changeable stones

Agate is the Gemini stone on the modern chart and in Kunz's English list — his Spanish list says sapphire. Citrine and tiger's eye are modern additions. Citrine is the one we can set at scale.

The Natural Citrine Ring centers a mined 21-carat cushion cut at 17mm × 19mm with 58 facets, circled by 36 natural white sapphires. The band is .925 sterling under 3 microns of 14K yellow gold, so the whole piece reads warm — gold metal, amber stone, one color family rather than a contrast. Worth knowing: most citrine on the market is heat-treated amethyst, and color alone is not a reliable way to tell the two apart — heated material runs through the same yellow and orange range. The listing states which you are getting rather than leaving you to eyeball it.

Libra — sapphire, the level head

Libra is the sign where the lists fall apart hardest. The modern chart says sapphire, opal and lapis; Kunz's English list says chrysolite, an old name that covered peridot and yellow chrysoberyl; the Spanish list says jasper. Sapphire blue is the association buyers arrive with, and we don't stock opal.

The Blue Sapphire Dragon Claw Ring holds a 35-carat emerald-cut sapphire-blue cubic zirconia at 15mm × 20mm — a simulant, and priced like one — in 26 grams of solid silver with hammered scale work behind the talons. Indoors the stone reads nearly black; under direct light it throws deep blue with occasional violet.

Aquarius — amethyst, the contrarian's purple

Aquarius is where the modern chart hedges: it lists amethyst and garnet, which happens to cover both of Kunz's 1913 answers — his Spanish list says amethyst, his English one says garnet. The stone's name is Greek: amethystos, "not intoxicated," from the belief that it kept a drinker sober.

The Amethyst Bishop Ring sets a mined oval amethyst at 19mm × 22mm under 14K gold-plated crosses, with 16 CZ stones at 0.2 ct each forming the halo. One thing we notice from stock: of the 34 bishop rings live on the site right now, 19 are built around amethyst — more than every other stone in that collection put together. If your sign points at purple, you have the widest choice of anyone here.

Water Signs: Cancer, Scorpio, Pisces

Water signs tend toward birthstones with something moving inside them. Cancer and Pisces are served here by pendants rather than rings, which is the honest answer for anyone who doesn't wear a heavy band.

Cancer — moonstone, ruled by the moon

Cancer is ruled by the Moon, so moonstone is almost too neat — and it is a modern assignment, borrowed from June's calendar list. Kunz gives Cancer emerald. The optical effect is the real draw: that blue-white glow rolling across the surface is called adularescence, and it comes from light scattering between microscopically thin alternating layers of orthoclase and albite feldspar — the same reason the glow reads bluish-white rather than rainbow. The Moonstone Pendant carries a genuine moonstone in a floral frame set with small CZ accents, 17 grams at 7/8″ × 1 5/8″.

That blue-white drift has a name, and a set of counterfeits to go with it. Our moonstone meaning guide covers adularescence, what each color actually is, and the three checks that separate a real cabochon from opalite glass.

Scorpio — topaz, the deep end

Topaz is Scorpio's stone on the modern chart, though Kunz's English list assigns topaz to Sagittarius and gives Scorpio beryl — the Spanish list says garnet. If you want the mined version, the 21-carat natural blue topaz ring is a cushion cut at 17.5mm × 19mm, AAA sky-blue, Mohs 8, in a gold-plated sterling frame with a 28-stone halo. If you want the gothic read instead, our blue topaz dragon claw ring carries a 36-carat sky-blue cubic zirconia rather than a mined topaz, in 30 grams of silver — it lives in the claw rings lineup alongside the rest of the talon settings.

Pisces — moonstone for the dreamer

Pisces is one of eight signs where the modern chart and Kunz's English list land on the same stone — here, amethyst. His Spanish list simply leaves Pisces blank, the only sign he never filled in. Moonstone and aquamarine are the modern additions, borrowed from June and March. Green moonstone leans furthest into the drifting quality people pick Pisces stones for: the Green Moonstone Pendant sets a genuine cabochon in a floral gothic frame, 17 grams at 22mm × 41mm, and the color runs from pale sage to deeper jade depending on the light hitting it.

Mined, Lab-Grown, or Simulant? What Each Ring Actually Holds

Three different things get called "the stone" on a birthstone ring, and they are not interchangeable. A mined stone came out of the ground. A lab-grown stone has the identical chemistry and hardness to the mined version — a synthetic ruby is corundum at Mohs 9, exactly like a natural ruby, just crystallized in a controlled environment. A simulant only imitates the look: cubic zirconia is zirconium dioxide at Mohs 8 to 8.5, chemically unrelated to any gem it stands in for.

Across the twelve signs on this page, the peridot, citrine, amethyst, turquoise, both moonstones, the onyx, the natural garnet and the natural blue topaz are mined stones. The ruby bishop ring's center is lab-grown ruby with a CZ halo. The garnet claw, green dragon claw, sapphire dragon claw and blue topaz dragon claw all center colored cubic zirconia — at 35 and 36 carats, sizes where the mined equivalent in that color and clarity belongs in an auction catalog rather than on a working hand. Every product page states which of the three you are getting.

Most of these stones live in the bishop ring collection — the domed, single-stone style, and where the color range is widest — or in the clawed rings for a heavier gothic read. Same stone, two completely different rings: a Taurus and a Scorpio can wear identical green or blue and look nothing alike depending on which setting it sits in.

Start with the color you would actually wear, decide whether a mined birthstone matters to you for the meaning, then pick the build. Most of these signs point at a ring, and the full ring collection is where those live — Cancer and Pisces are the two that end up on a chain instead.