The Origin of Birthstones: From an Ancient Breastplate to the Modern List

Where birthstones come from, how Aaron's breastplate and later traditions shaped them, and how the modern birthstone list was set in 1912.

History edit

Twelve stones, three thousand years of meaning.

The idea of a stone for every month didn't start in a jewelry catalog. It grew out of an ancient religious garment, early scholars' interpretations, and a 20th-century effort to agree on one list.

Answer key: birthstones trace back to the 12 stones on Aaron's breastplate described in the Book of Exodus; later writers linked them to the 12 months, and jewelers standardized the modern US list in 1912

Historical stone names don't always match modern gem names, so scholars still debate exactly which stones were meant. To shop birth-month pieces, browse our birthstone jewelry.

Quick Answer: Where Do Birthstones Come From?

Birthstones are generally traced to the breastplate of Aaron described in the Book of Exodus, which held 12 stones representing the 12 tribes of Israel. In the first century, the historian Josephus connected those 12 stones to the 12 months and the signs of the zodiac. Over later centuries the custom shifted to owning or wearing one stone for your birth month, and in 1912 the National Association of Jewelers (now Jewelers of America) adopted the modern birthstone list used in the United States.

Key Takeaways

• The birthstone tradition is usually traced to Aaron's breastplate in the Book of Exodus.
• The 12 stones represented the 12 tribes of Israel.
• The historian Josephus, writing in the first century, connected the stones to the months and zodiac.
• The modern US birthstone list was adopted in 1912 and has been updated a few times since.
• Ancient gem names don't always match modern ones, so exact identifications are debated.

On This Page

• Birthstones in the Bible
• From Twelve Tribes to Twelve Months
• How the Modern Birthstone List Was Set
• Birthstones by Month Today
• Shop the story
• FAQ

Birthstones in the Bible

The Book of Exodus describes a breastpiece worn by the high priest Aaron, set with four rows of three stones. Each stone was engraved with the name of one of the 12 tribes of Israel. Because ancient writers often grouped gems by color rather than mineral, a stone translated as one gem in an older text may have been a different stone than the one we use that name for today.

The Book of Revelation later lists 12 foundation stones of the New Jerusalem, which some writers also connect to the birthstone tradition.

From Twelve Tribes to Twelve Months

In the first century, the historian Josephus drew a connection between the breastplate's 12 stones, the 12 months of the year and the 12 signs of the zodiac. Early Christian writers built on these ideas, and by the medieval period some people collected all 12 stones and wore each one during its month.

Over time, the practice moved toward wearing only the stone linked to your own birth month, which is the tradition most people know today.

Gifting note

An old tradition, worn in a modern way.

Family pieces that combine several birth months echo the older custom of keeping more than one stone, while a single month color keeps the gift personal.

Shop birthstone jewelry

How the Modern Birthstone List Was Set

Before 1912, lists varied by country and even by jeweler. The standardized list gave shoppers and retailers a single reference, while traditional lists from other cultures still exist alongside it.

Birthstones by Month Today

If you're choosing a gift, our birthstone jewelry gift guide walks through meanings and styles by month.

Shop the Story

Birth-month pieces with a story

Heart Locket Birthstone Necklace A heart locket with a birth-month color accent, made for keepsake gifting. $64.00 View piece Birth Flower & Birthstone Necklace Pairs a birth flower with a month color for a double meaning. $59.00 View piece Family Birthstone Open Ring An open ring that brings more than one birth-month color together. $59.00 View piece

Choose your month options before adding to cart. Product pages are the source of truth for materials and options.

FAQ

What is the origin of birthstones?

Birthstones are generally traced to the 12 stones on the breastplate of Aaron in the Book of Exodus, which represented the 12 tribes of Israel and were later linked to the 12 months.

Are birthstones mentioned in the Bible?

The Bible does not use the word birthstone, but the 12 stones of Aaron's breastplate in Exodus are widely seen as the origin of the tradition.

Who created the modern birthstone list?

The National Association of Jewelers, now Jewelers of America, adopted the modern US birthstone list in 1912.

When was the birthstone list last updated?

The most recent major addition was spinel for August in 2016, following tanzanite for December in 2002.

Why do some months have more than one birthstone?

Later updates added alternatives to give more choice in color and price, so months like June, October and December have several options.

Related Guides

• Birthstone Jewelry Gift Guide
• Birthstone Necklace Guide
• Birth Flower Necklace Guide
• The Rarest and Most Expensive Birthstones

Final Buying Note

From a priest's breastplate to a 1912 jewelers' convention, birthstones have always been about identity and belonging. A birth-month piece carries that same idea forward.