The Soul of Koso

Koso was built for the girl who wants it all and refuses to settle. Demi-fine jewelry that lives between costume and fine. Real materials, real craft, real price. Wear it to work. Wear it out. Wear it to bed if you want.

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Demi-fine. Defined by us.

The gap between fast fashion and fine jewelry? We live there.
Two materials. One obsession. 925 sterling silver for when you want heirloom energy. Surgical-grade stainless steel for when you want it every day without thinking twice.

Made for sensitive skin (and sensitive aesthetics).
Both our silver and steel are hypoallergenic - no green fingers, no reactions, no drama. Just jewels that feel as good as they look.

Plated. Not pretending.
Fine gold, rose gold, and rhodium plating over premium metal bases. The finish looks expensive because the process is expensive. We just don't charge you like it is.

Hallmarked where it counts.
Every sterling silver piece carries the 925 hallmark. Our steel line meets surgical-grade standards. You're not taking our word for it - it's on the metal.