An engagement ring, also called a betrothal ring, is a ring that shows the person wearing it is engaged to be married, especially in Western cultures. A partner gives an engagement ring to their future spouse when they propose marriage. This ring represents a formal agreement to get married in the future. In most Western countries, engagement rings are usually worn only by women and often have diamonds. In some places, both partners wear matching rings, and engagement rings may also be used as wedding rings. In the Anglosphere, the ring is usually worn on the left ring finger, but customs differ around the world.

Engagement rings have been common in Western countries since at least the time of the Roman Empire. They began to include diamonds during the Renaissance, and became strongly linked to diamonds after a marketing campaign by the De Beers Group from 1939 to 1979.

In some Christian traditions, engagement rings may be blessed and worn during a betrothal ceremony. However, neither the engagement ring nor any other ring is worn during the part of the wedding ceremony when the groom places the wedding ring on the bride’s finger, or when the bride places it on the groom’s finger. After the wedding, the engagement ring is sometimes worn again, usually placed outside the wedding ring.

History

Although the ancient Egyptians are sometimes said to have created the idea of engagement rings and the ancient Greeks to have adopted the tradition, the history of engagement rings can only be reliably traced back to ancient Rome.

In many countries, engagement rings are placed on the ring finger of the left hand. It was once believed that this finger had a vein (called the vena amoris) that connected directly to the heart. This idea was written about by Henry Swinburne in a book called A Treatise of Spousals, or Matrimonial Contracts (1686). The belief may have come from an ancient Roman book called Attic Nights, which quoted a text by Apion called Aegyptiacorum. In that text, the vein was originally described as a nervus, a word that can mean "nerve" or "sinew."

Some people believe that engagement rings were once part of a bride price, which was money or goods given to the bride's family to show ownership of the bride. However, modern scholars now question this idea.

In the second century BC, Roman women who were about to marry received two rings: a gold one for public events and an iron one for household duties. At one time, Roman citizens wore iron rings at home and gold rings in public. Later, senators who worked as ambassadors were given gold seal rings for use abroad. Over time, the right to wear gold rings was extended to other public officials, then to knights, and eventually to all freeborn people and even freedmen. For many years, Romans wore iron rings at home and gold rings in public. During this time, a woman might receive two engagement rings: one made of iron and one made of gold.

In the mid-7th century, the Visigothic Code stated that once a betrothal ring was given or accepted as a promise, the agreement could not be broken, even if no written contract existed.

In 860 AD, Pope Nicholas I wrote a letter to Boris I of Bulgaria, explaining that in the Western church, the man gave his betrothed an engagement ring. At the Fourth Council of the Lateran in 1215, Pope Innocent III required that marriages be announced publicly before they could take place. Some scholars have noted that this rule is similar to the tradition of giving engagement rings described by Pope Nicholas I.

The first well-documented use of a diamond ring for engagement was in 1477, when Archduke Maximilian of Austria gave a diamond ring to Mary of Burgundy during their betrothal. This practice later influenced wealthy people to give diamond rings to their loved ones.

During the Protestant Reformation, the wedding ring became the main ring used in marriage ceremonies, while the betrothal ring was no longer used. In Catholic countries, this change happened later.

During the Age of Enlightenment, two types of rings—gimmal rings and posie rings—were popular. Posie rings were often used to express feelings rather than to mark a formal engagement.

In South Africa, diamonds were first discovered in 1866 but were not identified as diamonds until 1867. By 1872, diamond mines produced over one million carats of diamonds each year. As production increased, more people could afford diamond rings. However, for many years, diamond engagement rings were mainly worn by the wealthy and nobility, while simpler bands were more common.

In 1852, the Koh-i-Noor diamond was re-cut and added to Queen Victoria's crown. This event led to a global interest in diamonds.

In the United States, the popularity of diamond engagement rings decreased after World War I and even more after the Great Depression.

In 1938, the diamond company De Beers began a marketing campaign that greatly influenced engagement ring traditions. During the 1930s, diamond prices dropped, and engagement rings were becoming less popular with younger people. Before World War II, only 10% of American engagement rings included diamonds. The campaign started with research and then included advertising. One key part of the campaign was teaching people about the "4 Cs" of diamonds: cut, carats, color, and clarity. In 1947, the slogan "a diamond is forever" was introduced. The goal of the campaign was to convince people that an engagement ring was essential and that only diamonds were suitable for such rings. Diamond sales in the United States increased from $23 million to $2.1 billion between 1939 and 1979.

Law professor Margaret F. Brining linked the rise in engagement ring sales in the United States after 1945 to the end of the "breach of promise" law, which allowed women whose fiancés broke off engagements to sue them for damages. This law was especially important for women who had been intimate with their fiancés but were expected to be virgins in marriage. After the law was abolished in all states, engagement rings became popular as a form of financial security for women, as they often kept the ring if the engagement ended.

In the early 21st century, the jewelry industry began selling engagement rings for men, calling them "mangagement rings."

Industry

In the 20th century, if a man could afford it, he usually chose and bought an engagement ring for his future wife when he proposed marriage. In some countries, both partners may choose and buy matching rings together. In the United States and Canada, only women traditionally wear engagement rings, but sometimes women also give their partners an engagement gift.

The cost of an engagement ring depends on the materials used, the design, whether it includes a gemstone, the value of the gemstone, and the seller. Gemstone prices depend on the type and quality of the stone. Diamonds are valued based on their size (carat), color, clarity, and cut. Other gemstones, like sapphires, rubies, and emeralds, use different systems. People may choose rings to honor family traditions, use family heirlooms, create a unique style, support ethical practices (such as avoiding diamonds linked to conflict or harmful mining), match personal tastes, or manage costs. Synthetic diamonds and alternatives like cubic zirconia and moissanite are also popular because they are more affordable and ethically responsible.

The idea that a man should spend a large part of his income on an engagement ring began in the mid-20th century when De Beers, a diamond company, promoted this idea to sell more diamonds. In the 1930s, they suggested spending one month’s income on a ring. In the 1980s, they suggested spending two months’ income (three months in Japan). In 2012, the average cost of an engagement ring in the United States was $4,000. However, a 2015 study found that nearly a quarter of couples did not buy a ring, and about a third spent less than $2,000. Less than 15% spent $4,000 or more. In the UK, the average cost ranged from £1,200 to £2,000. Research shows that expensive rings may be linked to higher divorce rates, possibly because spending over $2,000 can cause financial stress. Couples who spend less on rings and weddings often have longer marriages and lower divorce rates.

One reason for the popularity of expensive rings is their connection to marriage traditions and a woman’s future. Before the Great Depression, a man who ended an engagement could be sued for breaking a promise. He might have to pay for wedding costs, emotional harm, and lost marriage opportunities. If the woman had sexual relations with her fiancé, damages were higher. These laws changed in 1935, but societal pressure remained strong. Marriage was the only financially stable option for many women, and losing virginity could hurt their future marriage chances. Diamonds became a way to provide financial security for women.

Buying engagement rings online is becoming more common, changing the diamond market by making it more transparent. Online stores like Blue Nile, Brilliant Earth, and Costco now sell rings.

Engagement rings come in many styles. Gold (yellow, white, or rose) and platinum are popular, but other metals like titanium, silver, and stainless steel are also used. This lets people choose a style that reflects their personal taste.

In the United States, diamonds have been common in engagement rings since the mid-20th century. Solitaire rings have one diamond, and the most popular setting is the solitaire prong design, first popularized by Tiffany & Co. in 1886. The modern favorite diamond cut is the brilliant cut, which gives the most sparkle. Other styles include rings with side stones or three diamonds in a row, called trilogy rings, which symbolize the past, present, and future.

A wedding set includes an engagement ring and a matching wedding band that can be bought together. Sometimes the wedding band is incomplete until paired with the engagement ring. Other sets have two matching rings worn stacked. After marriage, the rings may be joined to avoid losing one. A trio set includes a woman’s engagement ring, a woman’s wedding band, and a man’s wedding band, often with matching designs and lower prices.

In Nordic countries, both men and women wear engagement rings, usually simple gold bands. In the United States, engagement rings often have a large center stone, while wedding bands are simpler. In North America and the UK, rings are typically worn on the left ring finger, a tradition linked to an ancient belief that a vein in this finger connects to the heart. In Germany, the ring is worn on the left hand while engaged and moved to the right after marriage. In Poland and Turkey, rings are traditionally worn on the right hand, though modern practices vary.

Tradition says that if a man breaks off an engagement, the woman does not have to return the ring. This reflects the ring’s role in protecting the woman’s reputation. Legally, this may depend on whether the man is at fault for ending the relationship.