Sterling Silver Identification: 925, Sterling, 800 — What Do They Mean?

The most common question in silver collecting is simple: "Is this real silver?" This guide explains the marks that distinguish solid sterling silver from continental silver, coin silver, and silver-plated items, plus at-home testing methods to verify authenticity.

What Does "925" Mean on Silver?

The stamp "925" means the item is 92.5% pure silver (sterling standard). The remaining 7.5% is typically copper, added for strength and durability. Pure silver (99.9%) is too soft for practical use in tableware and jewelry.

The "925" mark is the international standard and is recognized worldwide. You'll find it on silver from the United States, Mexico, Italy, Thailand, and many other countries. It is identical in meaning to the word "Sterling" or the British lion passant mark.

What Does "Sterling" Mean?

The word "Sterling" stamped on silver has the same meaning as "925" — it guarantees 92.5% silver purity. The term originated in medieval England and has been used as an official silver standard since the Sterling Silver Trade Mark Act of 1868 in the United States.

Variations you may see:

• "STERLING" — Full word, most common on American silver
• "STG" — Abbreviation, used on small items
• "STER" — Another abbreviation
• "925 Sterling" — Both marks together for clarity

What Does "800" Mean on Silver?

The "800" stamp indicates 80% pure silver, which is the continental European standard. This is lower purity than sterling (925) but is still solid silver. It's most commonly found on silver from:

• Germany — Often paired with the crescent and crown mark
• Italy — Paired with the star mark and province number
• Austria — Used throughout the Habsburg Empire
• Switzerland, Portugal, and other continental countries

Solid Silver vs Silver Plated: How to Tell the Difference

This is the most important distinction in silver identification. Solid silver and silver plate look identical to the untrained eye, but their values are vastly different.

At-Home Silver Testing Methods

The Magnet Test

Hold a strong magnet (neodymium works best) against the item. Real silver is not magnetic. If the magnet sticks or the item pulls toward it, the item is not solid silver. Note: this test only rules silver out; passing the magnet test doesn't confirm silver, as many non-silver metals are also non-magnetic.

The Ice Test

Place an ice cube directly on the silver surface. Silver has the highest thermal conductivity of any metal, so ice will melt noticeably faster on real silver than on stainless steel or plated items. The ice should begin melting almost immediately on contact.

The Sound Test

Tap the item gently with your fingernail or a coin. Real silver produces a clear, high-pitched ring that sustains for a moment. Silver-plated items or base metals produce a duller, shorter sound.

The Tarnish Test

Silver tarnishes (turns dark/black) when exposed to sulfur compounds in the air. If an item shows uneven tarnish with a different-colored metal showing through (copper or brass), it is silver-plated and the plating has worn through.

Professional Testing

For valuable pieces or when you need certainty:

• Acid test kits — A drop of testing acid on a discreet spot reveals the metal composition by color change. Available online for under $15.
• XRF analysis — Non-destructive electronic testing used by dealers and auction houses. Gives exact metal composition.
• Specific gravity test — Weighing the item in air and in water reveals its density, which can identify silver.

Common Marks That Are NOT Silver