Is stainless steel a good base for gold jewelry?
For jewelry worn every day, yes, and for a reason you can check rather than take on trust: steel contains no copper, so there is nothing in it to leave a green mark, and its chromium forms an oxide film that repairs itself. What it does not tell you is how long the gold on top will last. That is a separate question with a separate answer.
By SIAFRA
Stainless steel is the best of the common bases for everyday gold-coloured jewelry, because it has no copper to mark skin and it does not tarnish. It is not the most valuable base, and it says nothing about the gold layer sitting on top of it.
The three bases you will actually meet
| Base | Green marks? | Tarnishes? | Usually found in |
|---|---|---|---|
| Stainless steel | No copper, so no | No, chromium oxide film | Everyday and waterproof ranges |
| Brass | Yes, copper salts | Yes | Most fashion jewelry under $50 |
| Sterling silver (vermeil) | No | Yes, darkens | Demi-fine, often $60 to $200 |
Brass is cheap and workable, which is why so much costume jewelry uses it, and copper is why the green mark is the single most common complaint in the category. The mechanism is in why jewelry turns skin green.
Why steel does not tarnish
Stainless steel carries at least 10.5% chromium. That chromium reacts with air to form an extremely thin oxide film across the surface, and when the film is scratched it forms again. Tarnish is a surface reaction, and steel is built to prevent one. Silver tarnishes black and copper goes green; steel does neither.
316 and 304 are the two grades you will see named. Both are austenitic steels and both behave this way. 316 adds molybdenum, which improves resistance to chlorides, the family that includes salt and sweat.
What a steel base does not promise
It does not tell you how thick the gold layer is, how it was applied, or how long it will stay. A steel base makes the failure graceful rather than preventing it: when the finish eventually wears, what appears is more steel rather than a green mark.
So the two questions are separate, and a good product page answers both. Ours says 316 stainless steel with an 18K gold PVD finish, and says plainly that measured coating thickness and accelerated wear are not published yet. The specifications page carries the current testing status.
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