The Proof Standard
Every jewelry seller in Indonesia says the same three things. Anti-karat. Anti-hitam. Anti-alergi. Almost none of them explain why. You've probably bought a piece that promised all three — and watched it darken in a month anyway.
We built Shinyuu around a different standard: if we claim it, we explain it. That's the whole idea.
The metal
Start with the steel.
Most cheap "gold" jewelry is plated brass. Brass corrodes — slowly, invisibly, underneath the plating — until the surface lifts, flakes, and turns your skin green.
Shinyuu uses 316L stainless steel. It's the grade used for surgical implants, chosen because it does almost nothing when it meets skin, sweat, or water. Its chromium content forms an oxide layer that repairs itself when scratched. That layer is the actual mechanism behind "anti-tarnish." Not a coating. Not a promise. Chemistry.
The plating
Gold with something solid to hold onto.
Our 18K gold plating is bonded to a metal that won't corrode beneath it. That matters more than plating thickness — plated finishes most often fail from below, when the base metal reacts. Stable base, stable finish. Wear it in the shower. Wash your hands. Live your day.
Hypoallergenic, explained
Why your ears don't itch.
Most metal allergies are nickel allergies. 316L is a low-nickel-release alloy — the nickel is locked into the steel's structure, so almost none reaches your skin. That's why hospitals use it, and why daily wear is far less likely to end in the redness you've learned to expect.
Made to Fit
Sized to you. Not an average.
Factory jewelry ships in one standard size, cut for a customer who doesn't exist. Your wrist isn't average. Neither is your neckline. Every Shinyuu bracelet and necklace can be made to your exact measurement — same price, measured once with our guide, adjusted before it ships.
Find your sizeStands Behind It
We stand behind it. In writing.
Every piece carries a 30-day comprehensive warranty. Not because we expect problems — because accountability is what separates a claim from a promise. If we got it wrong, we make it right.
"Anyone can say anti-tarnish. We'd rather explain it."