Birthstones by Month: The Complete List of All 12 (With Meanings)

The short answer: the twelve birthstones by month are: January garnet, February amethyst, March aquamarine, April diamond, May emerald, June pearl (or alexandrite and moonstone), July ruby, August peridot (or spinel), September sapphire, October opal (or tourmaline), November topaz (or citrine), and December turquoise (or tanzanite and blue zircon). Each carries centuries of traditional meaning, listed below.

Birthstones run on the calendar month, which makes them cousins rather than twins of zodiac signs; the crossover is covered at the end, along with our companion guide to crystals for each zodiac sign.

The 12 birthstones and their meanings

January: Garnet. The deep red stone of protection and vitality. Travelers carried garnet for safe passage for centuries; its traditional gifts are energy, loyalty, and steady inner fire for the darkest month.

February: Amethyst. The purple quartz of calm and clarity. The ancient Greeks believed it prevented intoxication, and its modern reputation keeps the theme: sobriety of mind, peace, intuition, and protection from overwhelm.

March: Aquamarine. The sea-colored stone of courage and clear communication. Sailors trusted it for calm waters; tradition assigns it serenity, honest speech, and cooled tempers. Bloodstone is the older March alternate.

April: Diamond. The stone of invincibility and enduring love. The hardest natural material became the symbol of the unbreakable: clarity, strength, and commitment that survives pressure, which is the entire poetry of the engagement ring.

May: Emerald. The green stone of rebirth, growth, and wisdom. Beloved from Cleopatra’s mines onward, emerald traditionally carries fertility of every kind: gardens, ideas, love, and second chances.

June: Pearl. The only birthstone made by a living creature, and the stone of purity and wisdom earned through irritation transformed. June carries two modern alternates: alexandrite, the color-changing stone of balance, and moonstone, the intuition stone with obvious lunar credentials.

July: Ruby. The king of gems: passion, courage, and vitality. Burmese warriors carried rubies into battle for invincibility; the traditional gifts are heart fire, confidence, and protection of love.

August: Peridot. The bright green stone of light against darkness. Formed in volcanic fire and occasionally arriving on meteorites, peridot traditionally dispels nightmares and negativity and invites lightness of spirit. Spinel and sardonyx are the alternates.

September: Sapphire. The blue stone of truth, wisdom, and nobility. Clergy and royalty wore sapphire as a badge of heaven-oriented integrity; its traditional gifts are mental clarity, faithfulness, and calm authority.

October: Opal. The stone of imagination, carrying every color at once. Its traditional gifts are creativity, hope, and emotional expression. Tourmaline, the alternate, arrives in nearly every color and is read as a balancing stone.

November: Topaz. The golden stone of abundance and strength. Traditionally it soothes anger, builds confidence, and attracts prosperity; sunny citrine, the alternate, doubles down on joy and manifestation.

December: Turquoise. One of the oldest gems ever mined, the sky-colored stone of protection and friendship. Traditions from Persia to the American Southwest prize it as a guardian stone. Tanzanite and blue zircon are the modern alternates.

Where birthstone tradition comes from

The idea traces to the breastplate of Aaron described in Exodus, set with twelve stones for the twelve tribes, later mapped by scholars onto the twelve months and the twelve zodiac signs. People originally wore all twelve, one per month, until the custom narrowed to wearing your own birth month’s stone. The standardized modern list was fixed by the American jewelry industry in 1912 and has been lightly amended since, which is why several months carry alternates.

Birthstones and your zodiac sign

Because zodiac signs straddle two months, every sign touches two birthstones: a Leo born in July claims ruby, an August Leo claims peridot. Astrological tradition also assigns stones by sign rather than month, keyed to ruling planets, which is a partly different list. If your month stone has never resonated, your sign stone might: find it in our crystals by zodiac sign guide, and confirm your exact Sun sign, cusp birthdays included, with the birth chart calculator. Numerology fans can add a third layer: your life path number carries its own traditional stone associations.

The honest note, as always: no controlled study shows gemstones changing outcomes. What they demonstrably do is carry meaning, and objects that carry meaning change behavior: the garnet that reminds you to be brave works through you, which is the only mechanism anyone ever needed.