Sterling silver gets its name most likely from medieval merchants called “Easterlings,” skilled silversmiths from eastern Germany who were brought to England in the late 1100s to improve the quality of English coinage. Their reliable, high-purity silver became known as “easterling silver,” which was eventually shortened to “sterling silver.” The name stuck, and so did the standard they set: 92.5% pure silver, alloyed with other metals for strength.
The Easterlings Theory
During the reign of King Henry II (1154–1189), English coinage had a quality problem. The silver content of coins varied, undermining trust in trade. Henry II brought in a group of silversmiths from the Hanseatic trading cities of eastern Europe, known collectively as “Easterlings,” who had a reputation for producing coins with consistent, dependable silver purity.
These craftsmen established a new minting standard: silver that was 92.5% pure, with the remaining 7.5% made up of other metals, typically copper. The silver they produced became known as “easterling silver,” and over time, everyday usage trimmed that down to simply “sterling.” While some historians have proposed alternative origins for the word, the Easterlings theory is the most widely cited and appears in Britannica and other major reference sources.
Why 92.5% and Not 100%
Pure silver (99.9% purity, called “fine silver”) is beautiful but impractical. It’s too soft. A ring made from fine silver would bend out of shape within days of regular wear. A coin struck from pure silver would lose its detail quickly as it passed from hand to hand.
Adding about 7.5% copper solves that problem. Copper increases the hardness and strength of the alloy significantly, making it suitable for coins, jewelry, flatware, and decorative objects. The tradeoff is tarnish. Fine silver barely tarnishes at all, but the copper in sterling silver reacts with sulfur compounds in the air, producing that familiar dark patina over time. For most people, the durability is worth the occasional polishing. Sterling silver can look good for a lifetime with basic care, while fine silver jewelry is easily damaged and not practical for everyday wear.
The 925 Stamp
If you’ve ever flipped over a silver ring or looked at the back of a spoon and noticed a tiny “925” engraved on it, that number refers directly to the sterling standard. It means 925 parts out of 1,000 are pure silver, which is the same as 92.5%.
In the United States, federal guidelines from the FTC are clear: a product cannot be labeled “sterling silver,” “sterling,” or stamped “925” unless it contains at least 925/1,000ths pure silver. Silver-plated items are explicitly prohibited from carrying the word “sterling” at all. In the United Kingdom, the Hallmarking Act of 1973 codifies the same threshold. If something is described as “sterling,” British law presumes the silver is of a fineness of 925.
England’s Lion Passant Hallmark
Long before modern consumer protection laws, England developed one of the world’s earliest quality-control systems for silver. In 1544, during the reign of Henry VIII, an official mark called the “lion passant” was introduced. It depicts a lion walking with three paws on the ground and the right forepaw raised. Originally, the lion’s head was turned to face the viewer, but after 1821 it was changed to face forward in the direction of travel.
The lion passant became the most widely recognized hallmark for English sterling silver. After 1720, every English assay office (the facilities responsible for testing metal purity) used the same lion passant stamp, even though their other marks varied by location. If you come across antique English silverware, spotting that tiny walking lion is one of the quickest ways to confirm it meets the sterling standard.
Sterling Silver in Historical Currency
The connection between “sterling” and money runs deeper than most people realize. For centuries, English currency was literally defined by the weight and purity of sterling silver. A “pound sterling” originally meant one pound weight of sterling-quality silver, divided into 240 pennies. The weight standard used was the Tower pound, so named because the official reference weight was kept in the Royal Mint at the Tower of London. A Tower pound contained 5,400 grains, roughly 350 grams.
This is why British currency is still called “pounds sterling” today, even though modern coins contain no silver at all. The name is a direct linguistic fossil from the medieval system that the Easterling silversmiths helped establish over 800 years ago.