Gold and Silver Hallmarks Decoder: 375, 417, 585, 750, 916, 925
So what does 750 mean on gold? Simple: 750 means the piece is 18K, which is 75.0% pure by weight. The other 25% is an alloy, usually copper, silver, or palladium, added for hardness and color. That tiny stamp is a millesimal fineness mark. Once you can read it, you’ll never confuse a $50 pendant with a $500 one again.
How hallmarks actually work
Jewelers use a three-digit system called millesimal fineness. The number is parts per thousand of the precious metal. 1000 would be pure. 750 parts per 1000 equals 75% pure. 925 parts per 1000 equals 92.5% pure, which you probably know as sterling. That’s the whole trick. Everything else is regional flavor.
The stamp is usually tiny. Grab a 10x loupe or a phone macro lens, because on a thin chain clasp you’re reading numbers the size of a grain of rice.
Gold hallmarks decoded
| Stamp | Karat | Purity | Common use |
|---|---|---|---|
| 375 | 9K | 37.5% | UK budget jewelry, chains |
| 417 | 10K | 41.7% | US everyday rings, class rings |
| 585 | 14K | 58.5% | US and European mid-tier, engagement rings |
| 750 | 18K | 75.0% | Fine jewelry, luxury watches, European standard |
| 875 | 21K | 87.5% | Middle Eastern pieces |
| 916 / 917 | 22K | 91.6% | Indian and Asian bridal, bullion coins |
| 999 | 24K | 99.9% | Investment bars, pure coins |
Notice what’s missing? Pure 1000. You can’t make jewelry from 24K because it bends if you look at it wrong. Even “pure” bullion usually stops at 999.9.
Silver hallmarks decoded
| Stamp | Name | Country / usage |
|---|---|---|
| 800 | Continental silver | Germany, Italy, older European flatware |
| 900 | Coin silver | US coins, antique American pieces |
| 925 | Sterling silver | Worldwide standard for jewelry and flatware |
| 950 | French first standard | High-end French silver |
| 999 | Fine silver | Bullion rounds and bars |
Platinum and palladium marks
These use the same fineness logic but with the metal prefix. Pt950 is 95% platinum, which is the typical wedding band grade. Pt900 shows up on older pieces. Pd950 is palladium at 95% purity, popular for lighter white-metal rings. Plat or PLAT stamped alone usually means 950 or higher in the US.
Where to look for the mark
- Rings: inside the band near the join.
- Chains and necklaces: on the clasp or a small tag dangling next to it.
- Earrings: on the post, or the back of the setting.
- Bracelets: on the tongue of the clasp.
- Flatware and hollowware: on the underside of the handle (the tang) or the base.
- Watches: case back, or inside the lug.
Country-specific marks
- UK: The British Assay Office adds extras beyond the number. A lion passant means sterling. A crown denotes karat gold. You’ll also see a date letter and an assay town punch (anchor for Birmingham, leopard head for London).
- France: Minerva head for 925+ silver. Eagle head for 750 karat pieces.
- Russia and ex-Soviet: 585 and 750 are common, paired with a Kokoshnik head punch.
- Italy and Germany: Usually just the number plus a maker registration.
Maker marks vs quality marks
Two stamps you’ll often see together. The quality mark (585, 925, etc.) is the purity. The maker mark is the manufacturer signature, usually initials in a shaped cartouche. Tiffany stamps T&Co. A no-name chain might just read MADE IN ITALY plus 925. Both are legitimate.
What if there’s no mark at all?
Unmarked doesn’t automatically mean fake. Pre-1970s pieces, handmade jewelry, and items from countries without mandatory hallmarking often skip stamps entirely. Before you assume it’s plated, run an acid test, a ping test, or take it to a jeweler with an XRF gun. A real vs fake gold test takes about two minutes at home.
FAQ
What does 750 mean on gold?
750 means 18K gold at 75.0% purity. The remaining 25% is alloy metals that add strength and color.
Is 925 real silver?
Yes. 925 is sterling silver, 92.5% pure silver with 7.5% copper. It’s the worldwide standard for silver jewelry and flatware.
What is 585 gold?
585 is 14K at 58.5% purity. It’s the most common standard for US and European engagement rings and everyday fine jewelry.
What does 417 mean?
417 is 10K at 41.7% purity. It’s the US legal minimum to be sold as gold, and shows up on class rings and budget pieces.
What is 916 gold?
916 (sometimes 917) is 22K at 91.6% purity. It’s the bridal standard across India and much of Asia, and the fineness of American Eagle bullion coins.
Can fake gold be stamped 750?
It can. Counterfeit stamps exist. If a piece feels too light, has green or black tarnish where skin touches it, or the price seemed too good, test it. The British Assay Office and the World Gold Council both publish mark references you can cross-check.
Which is better, 18K or 22K?
Depends on use. 18K (750) holds gemstones better and resists scratches. 22K (916) is richer in color and higher resale, but too soft for prong settings.
Decode the stamp, then price the piece
Once you know what does 750 mean on gold (or 585, or 925), you can actually put a dollar figure on what you’re holding. Plug the weight and fineness into the USA gold calculator for current scrap value, use the gold-filled vs gold-plated guide if the stamp says GF or GP instead of a number, or check the sterling silverware value tool for flatware marked 925. A two-second stamp read plus a 30-second calculation beats guessing every time.