History of Birthstones Through the Ages: From Biblical Breastplates to Marketing Genius

It is easy to assume birthstones were invented by a marketing department. The truth is more layered. The idea of assigning gemstones to people and time periods is thousands of years old, while the chart you see in jewelry stores today was shaped by a trade association in the early twentieth century. This guide follows that story from the biblical breastplate to modern revisions, and separates what is documented from what is legend. If you want a shorter introduction first, start with What Are Birthstones? The Complete Beginner’s Guide.

A note on method: the origins of birthstones are partly historical and partly traditional, and scholars disagree on many details. Where sources conflict, this article says so. Any meanings attached to stones are cultural traditions and beliefs, not scientific claims or medical advice.

Timeline at a Glance

Gemstones as Talismans Before Birthstones

People wore stones for protection and status long before anyone had a birth month stone. Archaeologists have found early jewelry made from turquoise, lapis lazuli, carnelian and gold in Egyptian tombs. Bracelets of gold and turquoise were recovered from the tomb of King Djer at Abydos, who ruled in the First Dynasty roughly five thousand years ago. Nobody called these stones birthstones, but they show that gems already carried meaning as protection and display.

The Breastplate: Where the Twelve-Stone Tradition Begins

The best-known ancestor of the birthstone idea appears in the Book of Exodus. Chapter 28 describes the Hoshen, the Breastplate of Judgment, a garment for Aaron, the High Priest of the Israelites. It was square, folded double, and set with four rows of precious stones.

Twelve stones were mounted in four rows of three, each engraved with the name of one of the twelve tribes of Israel. The breastplate was not a birthstone chart. The stones represented lineages, and the High Priest wore all twelve together as a symbol of carrying the whole nation. What it did create was the first well-known Western example of twelve specific stones assigned to twelve identities.

Which Stones Were They?

Nobody can say for certain. The Hebrew names in the text (odem, pitdah, bareqet, nophek, sappir, yahalom, leshem, shebo, achlamah, tarshish, shoham, yashpheh) do not map cleanly onto modern gemology, because ancient peoples classified stones largely by color and appearance rather than by chemistry. A blue stone called sappir might have been lapis lazuli rather than what we now call sapphire.

Scholars and writers have proposed many reconstructions. Josephus, the first-century historian, gave lists that differ from the biblical text, and the gemologist George Frederick Kunz argued that Josephus may have been describing a later temple breastplate rather than the original described in Exodus. Reconstructions published by various museums and magazines include stones such as carnelian, peridot, emerald, garnet, lapis lazuli, amethyst, agate, onyx and jasper, but they do not agree. For anyone comparing modern stones to the breastplate, the honest answer is that the match is approximate.

Why Twelve? Zodiac, Apostles and Months

The breastplate gave the West twelve stones, but the number twelve was already important in other systems.

• The zodiac: Babylonian and later Greek astronomers divided the sky into twelve signs, and astrological traditions came to pair planets and signs with particular gems.
• The foundation stones: The Book of Revelation describes the walls of the New Jerusalem built on twelve foundation stones. Early Christian writers, including St. Jerome, connected these to the breastplate.
• The calendar: Roman, Hebrew and Arabic traditions all linked gems to seasons or celestial positions across a twelve-month year.

Josephus, writing in the first century in his Antiquities of the Jews, is the earliest writer we know of who explicitly connected the breastplate stones to the twelve months and the twelve zodiac signs. That link is the conceptual bridge between a priest’s garment and the idea of a stone tied to a time of year. To see how zodiac pairings differ from monthly ones today, read Zodiac Birthstones vs. Monthly Birthstones and browse the zodiac birthstones overview.

The Medieval Shift: From Tribes to Individuals

For centuries, the idea of stones tied to the year lived mostly in religious and scholarly writing. In the eighth and ninth centuries, religious writers composed treatises associating stones with the twelve apostles, following the logic of the Revelation foundation stones. Where the breastplate stones had stood for tribes, these stones stood for individuals, which helped lay the psychological groundwork for personal stones.

According to Kunz’s account, the next stage was a practice of keeping a set of twelve stones and wearing the one that belonged to the current month, because each gem was thought to be most potent during its own month. That is different from wearing a single stone for your birth month all year, which came later.

Poland, Germany and the Origin Debate

When did people start wearing the stone for their own birth month? Historians do not agree. Kunz placed the custom in eighteenth-century Poland, where Jewish gem traders reportedly wore stones matching their birth months, with the practice spreading to the wider population. The Gemological Institute of America has dated the custom to sixteenth-century Germany, around the 1560s. Modern authorities differ on the dates, and the most defensible summary is that the personal birthstone emerged gradually in central and northern Europe between the sixteenth and eighteenth centuries.

The Victorian Era: Birthstones Become Sentimental

The nineteenth century turned birthstones into a mainstream sentimental tradition. Victorian culture embraced jewelry as a way of expressing feeling, from hair lockets to mourning jewelry, and a stone for a loved one’s birth month fit naturally into that world. Birthstone rings were a popular choice for engagements and keepsakes before diamond engagement rings became the overwhelming norm.

Tiffany & Co. first published month-by-month birthstone poems in a pamphlet in 1870, crediting an unknown author. The verses assigned a stone and a virtue to each month, and they are among the earliest widely distributed birthstone lists in the United States. Opening lines such as “By her who in this month is born, no gem save garnets should be worn” show how closely stones and character traits were tied together. The poems were not consistent with today’s lists: the June verse recommends agate and the August verse recommends sardonyx. Those are traditional alternatives you will still see on some historical charts.

George Frederick Kunz: The Scholar Behind the Chart

George Frederick Kunz (1856 to 1932) was a largely self-taught American gemologist who joined Tiffany & Co. as a young man and became one of the best-known gem experts of his day. He wrote widely on gems and published The Curious Lore of Precious Stones in 1913. He is also credited with a Tiffany booklet on natal stones from the early 1890s that gathered biblical, zodiacal, medieval and folk traditions into a single readable account.

Kunz did not invent birthstones; he recorded and popularized existing traditions. In The Curious Lore he is also associated with criticism of the 1912 standardization for favoring transparent, faceted “precious” stones over the traditional opaque, cabochon-cut stones of older lists.

1912: The Year the List Was Standardized

In August 1912, the National Association of Jewelers (now Jewelers of America) met in Kansas City and officially adopted a standard birthstone list. The goal was to replace a patchwork of regional and traditional lists with something retailers and customers could share. According to reference sources, the 1912 list was:

Critics were quick to object. The astrological writer Rupert Gleadow later described the list as unfounded salesmanship, and traditionalists disliked the shift toward transparent, faceted stones. Even so, the list gave jewelers a common reference and gave customers a clear answer to “What is my birthstone?” It is the direct ancestor of the charts used today.

Later Revisions: 1937, 1952, 2002, 2016 and 2021

• 1937: The National Association of Goldsmiths in Britain created its own standardized list, which differed from the American one. Birthstone lists became international and inconsistent.
• 1952: The Jewelry Industry Council of America updated the American list. It added alexandrite for June, citrine for November and pink tourmaline for October, replaced December’s lapis lazuli with zircon, and swapped the primary and alternate stones for March so aquamarine became the main stone.
• 2002: Tanzanite was added as a December birthstone. It had been discovered only in the late 1960s and had no historical birthstone tradition, which led critics to describe the change as commercially driven. For the stone’s rarity and market, see our tanzanite guide for December and the tanzanite overview.
• 2016: Spinel was added to August alongside peridot. Spinel has a long history of being mistaken for ruby, including the large red stone called the Black Prince’s Ruby in the British Imperial State Crown, which is a spinel.
• 2021: Japanese industry associations added ten new types of birthstones, a sign that national lists continue to evolve.

How the Eastern Tradition Differs: Navaratna

The Western one-stone-per-month system is not the only approach. In Hindu and Vedic astrological tradition, gemstones are assigned to the nine celestial bodies of the Navagraha rather than to calendar months. This system is known as the Navaratna, or “nine gems”. In that tradition, an astrologer interprets a birth chart based on the date, time and place of birth and may recommend particular stones.

The traditional correspondences are ruby (Sun), pearl (Moon), red coral (Mars), emerald (Mercury), yellow sapphire (Jupiter), diamond (Venus), blue sapphire (Saturn), hessonite garnet (Rahu) and cat’s eye chrysoberyl (Ketu). Because the system is personalized, two people born on the same date may be advised different stones. These are astrological beliefs, not scientific claims, and we mention them here for historical and cultural context.

Other Stone-Assignment Traditions

Birthstones are only one of several ways stones have been assigned to people. Traditional lists also exist for days of the week, zodiac signs and wedding anniversaries, and these lists differ between sources. One commonly cited zodiac list, for example, pairs bloodstone with Aries, sapphire with Taurus, agate with Gemini, emerald with Cancer, onyx with Leo, carnelian with Virgo, chrysolite with Libra, beryl with Scorpio, topaz with Sagittarius, ruby with Capricorn, garnet with Aquarius and amethyst with Pisces. Other authorities publish different lists, so treat any single chart as one tradition among several. You can compare modern zodiac pairings on our zodiac birthstones page.

Birthstone Lists Today

The lists most often used in the United States today are the following. Other countries and organizations vary, so always check which list a retailer or article follows.

Different organizations take slightly different positions, and trade bodies naturally favor stones their members sell. That is why you will see variations such as blue topaz instead of zircon for December in some retail catalogs, and why moonstone is on some June lists but not others. Variation is a long-standing feature of the system, not an error.

What the History Means for Buyers

Knowing the history helps with practical decisions.

• You have genuine choices. Because lists changed repeatedly, choosing a traditional stone like sardonyx or bloodstone, or a modern one like spinel, is entirely legitimate.
• Check which list a seller follows. A site may label tanzanite or blue topaz as a December stone while another leads with turquoise.
• Durability matters more than tradition for daily wear. Some traditional stones, such as pearl, opal and turquoise, are soft or porous and suit earrings and pendants better than everyday rings. See our birthstones by month guide for stone-by-stone notes.
• Ask about treatments and origin. Many birthstones are heat-treated, oiled or irradiated, and lab-grown versions exist for several. Our guide to natural vs. lab-grown birthstones explains the differences.

For related reading, see the companion article The History of Birthstones: From Ancient Times to Today, our shorter overview History of Birthstones Through the Ages, and the rest of the Education & Buying Guides for Birthstones collection.

Find Your Birth Month Stone

Explore the full birthstones by month guide, or open your month directly: January: Garnet, February: Amethyst, March: Aquamarine, April: Diamond, May: Emerald, June: Pearl, Alexandrite, Moonstone, July: Ruby, August: Peridot, Spinel, September: Sapphire, October: Opal, Tourmaline, November: Topaz, Citrine and December: Turquoise, Zircon, Tanzanite.