Customer Service

Handmade just for you!

We design and manufacture sterling silver jewelry with fine art jewelry finishes and hand sewn leather accessories. You can find us in gift stores, apparel boutiques, major national catalogs and websites.

Your order is handmade for you in our Emeryville California studio.

Returns & Exchanges

Please contact us in the unlikely event that your order arrives damaged or is not what you expected.

As we hand make each item for you, all sales are final.


For wholesale requests, please visit wholesale.zinakao.com  You will need applicable wholesale credentials: Tax ID, reseller number and business license. 

Get in touch!

We'd love to hear from you:

510.450.0131  ::  hello@zinakao.com ::  6050 Lowell Street #115 . Emeryville CA . 94608

Frequently asked questions

When will I receive my order?

Because we make everything by hand, on occasion, please allow 30 days lead time.

We ship all orders via USPS Priority mail from California.

If you need a specific delivery date, please let us know when you place your order.

My customer lost an earring - can i get another one?

We can make a single earring for you but it's not always easy! Please send us the single earring for us to match.

What about repairs?

We are happy to do repairs for a small fee. Please contact us to find out more.

What is your jewelry made of?

Almost everything we make is sterling silver, or 23kt gold over sterling. Chains and earwires are either sterling silver or 14kt gold-fill. The black charms and findings are sterling silver oxidized to a heavy black, then covered in a protective wax. Lockets, dogtags and selected small charms are plated brass. If you have a specific question on materials, please contact us.

Please note that our black items are a patina, not a paint. It will wear over time, creating a special high-low finish unique to you and your wear patterns.

For customers with metal allergies: like all plated items, our gold charms have a small amount of nickel under the 23kt gold covering.

How about your leather?

Our leather comes from a California company founded in the 1800s to service the Gold Rush. When the industrial leather tanning processes moved overseas in the 1980s, the company persevered by sourcing hides and having them custom tanned all over the world for specialty manufacturers such as us. Most of the hides we use were originally sourced from the American food chain.

Do you do custom designs?

We make everything in our studio, so many things are possible. Longer necklaces, special color combinations, matching earrings, reach out and ask. Note that we do not work in precious metals or gems, nor do we copy the work of other artists or manufacturers.

Do you wholesale?

Our primary business is wholesale manufacturing. To apply for wholesale, please contact us or visit our wholesale site: wholesale.zinakao.com