The Tradition of Birthstones
The tradition of associating specific gemstones with each month of the year stretches back thousands of years. Many scholars trace its origins to the Breastplate of Aaron described in the Book of Exodus, a ceremonial garment set with twelve gemstones representing the twelve tribes of Israel. Over the centuries, these twelve stones became linked to the twelve months of the year and the twelve signs of the zodiac.
The modern standardized list of birthstones was established in 1912 by the National Association of Jewelers (now Jewelers of America) in the United States. This list has been updated several times, most notably in 1952 and 2002, to add alternative stones for certain months. Today, the birthstone tradition is celebrated worldwide, and birthstone jewelry remains one of the most popular and meaningful gifts for birthdays, anniversaries, and milestones.
January: Garnet
Color: Most commonly deep red, but also orange, green, yellow, purple, and even color-changing varieties.
Hardness: 6.5 to 7.5 (varies by species)
Garnet is not a single mineral but a group of closely related silicate minerals that share a common crystal structure. The most familiar garnets are the deep red varieties — pyrope and almandine — but the garnet family also includes the vivid green tsavorite, the warm orange spessartine (mandarin garnet), and the rare color-changing garnets that shift from blue-green in daylight to purple-red under incandescent light.
Garnet has been used as a gemstone for over 5,000 years. Ancient Egyptians set garnets in jewelry and amulets, and Roman merchants used carved garnet signet rings to stamp wax seals on important documents. The name "garnet" comes from the Latin granatum, meaning pomegranate, because the small red crystals resemble pomegranate seeds.
Symbolism: Garnet is associated with protection, strength, and safe travels. Medieval warriors carried garnets as talismans, and the stone was believed to illuminate the night and ward off evil spirits.
Care: Garnet is moderately hard and suitable for all types of jewelry. Clean with warm soapy water and a soft brush. Avoid ultrasonic cleaners for garnets with known fractures.
February: Amethyst
Color: Purple, ranging from pale lilac to deep violet.
Hardness: 7
Amethyst is the purple variety of quartz, colored by iron impurities and natural irradiation. It is one of the most beloved gemstones in history, once ranked alongside diamond, ruby, and sapphire in value. The discovery of enormous deposits in Brazil in the 1800s made amethyst widely available, but fine specimens with deep, saturated color and excellent clarity remain highly prized.
The name comes from the Greek amethystos, meaning "not intoxicated." Ancient Greeks and Romans believed amethyst could prevent drunkenness and would carve drinking vessels from the purple stone or wear amethyst rings to keep a clear head during banquets.
Symbolism: Clarity of mind, spiritual wisdom, sobriety, and royalty. Amethyst has long been associated with ecclesiastical authority — Catholic bishops traditionally wore amethyst rings as symbols of piety.
Care: Amethyst is durable and excellent for everyday wear. Avoid prolonged exposure to strong sunlight, which can fade the color over time. Clean with warm soapy water.
March: Aquamarine
Color: Pale blue to blue-green, evoking the color of the sea.
Hardness: 7.5 to 8
Aquamarine is a variety of the mineral beryl — the same mineral family that includes emerald. Its delicate blue color comes from trace amounts of iron. The name literally means "water of the sea" in Latin, and sailors once carried aquamarine as a talisman for safe voyages.
The finest aquamarines display a pure, medium blue without greenish tints. Larger stones tend to show more intense color, and many aquamarines on the market are heat-treated to reduce greenish tones and deepen the blue. Brazil is the most important source, followed by Nigeria, Madagascar, and Pakistan.
Symbolism: Courage, serenity, and protection for travelers. Aquamarine was also believed to strengthen marriages and bring happiness to newlyweds.
Care: Aquamarine is excellent for jewelry with its hardness of 7.5 to 8. It is stable and resistant to most chemicals. Clean with warm soapy water or an ultrasonic cleaner.
April: Diamond
Color: Colorless is most traditional, but diamonds occur in every color of the rainbow.
Hardness: 10
Diamond is the hardest natural material on Earth, composed of pure carbon arranged in a rigid cubic crystal lattice. Its supreme hardness, exceptional brilliance (high refractive index), and fire (dispersion of light into spectral colors) make it the most celebrated gemstone in the world.
Diamonds form deep within the Earth's mantle, at depths of 150 to 700 kilometers, under extreme pressure and temperature. Learn more in our diamond vs moissanite comparison. They are brought to the surface by violent volcanic eruptions through geological formations called kimberlite pipes. The journey from mantle to surface may take billions of years.
Symbolism: Eternal love, invincibility, and purity. The tradition of diamond engagement rings dates to 1477, when Archduke Maximilian of Austria gave Mary of Burgundy a diamond ring. The phrase "a diamond is forever" was coined by De Beers in 1947 and became one of the most successful advertising slogans in history.
Care: Diamond is virtually scratch-proof but can be chipped by a hard blow along its cleavage planes. Clean with warm soapy water, an ultrasonic cleaner, or a steam cleaner. Store separately to prevent diamonds from scratching other jewelry.
May: Emerald
Color: Green, ranging from light to deep, vivid green.
Hardness: 7.5 to 8
Emerald is the green variety of beryl, colored by trace amounts of chromium and sometimes vanadium. It is one of the "Big Three" colored gemstones (along with ruby and sapphire) and has been treasured for over 4,000 years. Cleopatra was famously passionate about emeralds, and the ancient Egyptians mined emeralds in the Eastern Desert as early as 1500 BC.
Nearly all natural emeralds contain inclusions and fractures, which gemologists poetically call the jardin (French for "garden"). Heavily included emeralds are the norm rather than the exception, and the trade widely accepts oil treatment to improve clarity. The most prized emeralds come from Colombia, which produces stones with an exceptionally vivid, slightly bluish-green color.
Symbolism: Rebirth, fertility, love, and wisdom. Emerald was associated with the goddess Venus in Roman mythology and was believed to grant the power of foresight.
Care: Emeralds require gentle handling due to their inclusions. Avoid ultrasonic and steam cleaners, sudden temperature changes, and harsh chemicals. Clean with lukewarm soapy water and a very soft brush.
June: Alexandrite and Pearl
Alexandrite Color: Green in daylight, red under incandescent light.
Hardness: 8.5 (Alexandrite), 2.5 to 4.5 (Pearl)
June has two primary birthstones. Alexandrite is one of the rarest and most remarkable gemstones on Earth. It is a variety of chrysoberyl that appears green in daylight and red under incandescent light — a dramatic color change caused by the way the mineral absorbs light. Fine alexandrite with a strong, clean color change is extraordinarily valuable, often exceeding the price of diamonds.
Pearl is the organic birthstone for June, produced by mollusks — primarily oysters and mussels — as a defense mechanism against irritants. Cultured pearls have largely replaced natural pearls in the market. Akoya pearls from Japan, South Sea pearls from Australia and the Philippines, Tahitian pearls from French Polynesia, and freshwater pearls from China are the main commercial types.
Symbolism: Alexandrite represents balance and joy in transformation. Pearl symbolizes purity, innocence, and wisdom gained through experience.
Care: Alexandrite is very durable. Pearls are soft and organic — avoid chemicals, perfumes, and ultrasonic cleaners. Wipe pearls with a damp cloth after wearing and store separately.
July: Ruby
Color: Red, from pinkish-red to deep pigeon blood red.
Hardness: 9
Ruby is the red variety of corundum, colored by chromium. Along with sapphire (also corundum), it is one of the hardest gemstones available, surpassed only by diamond. The most prized rubies display a pure, vivid red with a slight bluish undertone, known as "pigeon blood" red, and come from Myanmar (Burma).
Ruby has been called the "king of gemstones" across many cultures. In ancient India, ruby was called ratnaraj, meaning "king of precious stones." In medieval Europe, rubies were believed to confer invulnerability in battle and to darken in color to warn their owners of approaching danger.
Symbolism: Passion, courage, vitality, and prosperity. Ruby is traditionally associated with the heart and with romantic love.
Care: Ruby is extremely durable (hardness 9) and suitable for daily wear in all jewelry types. Most rubies are heat-treated to improve color and clarity. Clean with warm soapy water, ultrasonic, or steam cleaners (unless the stone has significant fractures or cavity fillings).
August: Peridot
Color: Yellow-green to olive green, with the finest stones being a vivid lime green.
Hardness: 6.5 to 7
Peridot is the gem variety of the mineral olivine and is one of the few gemstones that occurs in only one color — green. The intensity of green varies with the iron content, from pale yellow-green to rich olive. The most desirable peridots display a vivid, pure green without brownish or yellowish tints.
Peridot has a fascinating origin: some specimens are truly extraterrestrial, found in pallasite meteorites that fell to Earth from outer space. Terrestrial peridot forms deep in the upper mantle and is brought to the surface by volcanic activity. The ancient Egyptians called peridot the "gem of the sun" and mined it on the volcanic island of Zabargad (St. John's Island) in the Red Sea for over 3,500 years.
Symbolism: Strength, protection, and healing. Peridot was believed to dissolve enchantments and dispel nightmares when set in gold.
Care: Peridot is moderately durable but can be sensitive to acids and rapid temperature changes. Avoid ultrasonic and steam cleaners. Clean gently with warm soapy water.
September: Sapphire
Color: Most famously blue, but sapphire occurs in every color except red (which is ruby).
Hardness: 9
Sapphire is the non-red variety of corundum. While blue sapphire is the most iconic and valuable, the mineral also occurs in pink, yellow, orange, green, purple, and the extremely rare padparadscha (a delicate pinkish-orange). The finest blue sapphires come from Kashmir, Myanmar, and Sri Lanka, with Kashmir sapphires — exhibiting a velvety, cornflower blue — being the most legendary.
Like ruby, sapphire has a hardness of 9, making it exceptionally durable for all types of jewelry. Its combination of beauty, durability, and rarity has made sapphire one of the most desired gemstones throughout history. The British Crown Jewels contain several famous sapphires, and Princess Diana's sapphire engagement ring (now worn by Catherine, Princess of Wales) is one of the most recognized pieces of jewelry in the world.
Symbolism: Wisdom, loyalty, nobility, and truth. In the Middle Ages, clergy wore sapphires to symbolize heaven, and the stone was believed to attract divine favor.
Care: Sapphire is extremely durable. Clean with warm soapy water, ultrasonic, or steam cleaners (unless the stone has fracture fillings or significant inclusions).
October: Opal and Tourmaline
Opal Color: Play-of-color displaying all spectral colors. Body color ranges from white to black.
Hardness: 5.5 to 6.5 (Opal), 7 to 7.5 (Tourmaline)
Opal is unique among gemstones for its play-of-color — a mesmerizing display of spectral colors that shift and dance as the stone is moved. This optical phenomenon is caused by the diffraction of light through a regular arrangement of microscopic silica spheres within the stone. Black opals from Lightning Ridge, Australia, with vivid play-of-color against a dark body, are among the most valuable gemstones in the world.
Tourmaline is October's modern alternative birthstone. It occurs in more colors than any other mineral species — pink, red (rubellite), green, blue (indicolite), yellow, orange, black, and even watermelon tourmaline that displays pink and green in a single crystal. This incredible color range makes tourmaline a favorite of both collectors and jewelry designers.
Symbolism: Opal represents creativity, hope, and inspiration. Tourmaline symbolizes compassion, tolerance, and understanding.
Care: Opal requires special care — avoid extreme temperatures, dry environments, and chemicals. Store in a slightly humid environment. Tourmaline is more durable and can be cleaned with warm soapy water.
November: Topaz and Citrine
Topaz Color: Naturally colorless, pale blue, yellow, orange (Imperial topaz), or pink.
Hardness: 8 (Topaz), 7 (Citrine)
Topaz occurs naturally in a range of colors, with Imperial topaz — a warm, golden-orange to pinkish-orange variety from Brazil — being the most valuable. Blue topaz, the most popular color in the market, is almost always produced by irradiating and heating colorless topaz. London Blue, Swiss Blue, and Sky Blue are trade names for different intensities of treated blue topaz.
Citrine is the golden-yellow to orange variety of quartz. Natural citrine is uncommon; most commercial citrine is heat-treated amethyst. Regardless of its origin, citrine's warm golden tones make it a popular and affordable gemstone.
Symbolism: Topaz represents strength, intelligence, and courage. Citrine symbolizes prosperity, success, and positive energy.
Care: Topaz has perfect basal cleavage — it can split along a flat plane if struck at the right angle. Avoid sharp impacts. Citrine is more durable and less fragile. Both can be cleaned with warm soapy water.
December: Tanzanite, Zircon, and Turquoise
December offers three beautiful birthstone options.
Tanzanite (hardness 6 to 7) is a vivid blue-violet variety of the mineral zoisite, discovered in 1967 near Mount Kilimanjaro in Tanzania — the only known source in the world. Its unique trichroic nature means it can display blue, violet, and burgundy colors from different angles. Nearly all tanzanite is heat-treated to develop its signature blue-violet color.
Zircon (hardness 7.5) is one of the oldest minerals on Earth — individual zircon crystals have been dated at 4.4 billion years old. Not to be confused with cubic zirconia (a synthetic diamond simulant), natural zircon occurs in blue, yellow, red, orange, green, and colorless varieties. Blue zircon, typically produced by heating brown zircon, is the most popular.
Turquoise (hardness 5 to 6) is an opaque, sky-blue to blue-green mineral that has been prized for over 6,000 years. It was among the first gemstones ever mined, with ancient Egyptians setting turquoise in gold jewelry as early as 4000 BC. The finest turquoise displays a pure, robin's-egg blue, often with attractive dark veining (matrix) of the host rock.
Symbolism: Tanzanite represents transformation and spiritual growth. Zircon symbolizes honor and wisdom. Turquoise is a stone of protection, friendship, and healing.
Care: Tanzanite is relatively fragile — avoid ultrasonic cleaners and sharp impacts. Zircon is moderately durable but can chip along edges. Turquoise is porous and should never be exposed to chemicals, oils, or prolonged sunlight. Clean all three with a damp cloth.
Choosing Your Birthstone
Whether you follow the traditional list or prefer a modern alternative, birthstones offer a deeply personal connection to the mineral world. Each stone carries millions of years of geological history, centuries of human symbolism, and a beauty that is entirely its own. Wearing your birthstone is not just a fashion choice — it is a way of carrying a piece of the Earth's story with you every day.