Mark Shimizu Design

Mark Shimizu Design Unique designs by Mark Shimizu and other local artists. Sterling, gold, platinum...we have somethin

06/16/2026

Did you know some everyday activities can slowly damage your rings over time? 💍

We love seeing people enjoy and wear their jewelry every day, but there are a few situations where taking your rings off may help protect them in the long run.

Here are 3 times we recommend removing your rings:

🏊 Swimming — frequent chlorine exposure can weaken metals over time and may lead to structural wear or loose stones.

🌱 Gardening — dirt, minerals, and abrasion can wear down metal and prongs faster than many people realize.

🏋️ The Gym — repeated pressure from heavy lifting can bend rings, weaken settings, or even contribute to stone loss over time.

A one-time workout or swim probably isn’t a big deal—but repeated exposure over months and years can definitely add up.

If you’re in Windsor or Sonoma County and want your jewelry professionally checked, cleaned, or inspected, stop by and see us. We’re always happy to help make sure your jewelry stays beautiful and secure for years to come. ✨

📍 Mark Shimizu Design — Downtown Windsor, CA
🛠 Jewelry Repair • Custom Jewelry • Ring Inspections • Estate Jewelry

What activity surprised you the most? Let us know below 👇

There’s just something timeless about Black Hills Gold jewelry 💛✨This beautiful estate Black Hills Gold ring is one of o...
06/13/2026

There’s just something timeless about Black Hills Gold jewelry 💛✨

This beautiful estate Black Hills Gold ring is one of our favorite pieces currently in the showroom at Mark Shimizu Design in Downtown Windsor. Featuring the iconic grape leaf detailing and signature tri-color gold design, this ring perfectly blends vintage character with bold elegance.

If you love estate jewelry, vintage rings, or unique one-of-a-kind pieces, this is definitely one worth seeing in person. You never know what hidden gems you’ll discover in our estate collection! 💎

📍 Mark Shimizu Design
9070 Windsor Rd, Windsor, CA
🕙 Open Tuesday–Saturday | 10 AM – 4 PM

Come stop by and explore our ever-changing selection of estate, consignment, and handcrafted jewelry in Sonoma County.

💚 Designed, handcrafted, and finished completely in-house.Here’s another beautiful custom jewelry piece designed and han...
06/10/2026

💚 Designed, handcrafted, and finished completely in-house.

Here’s another beautiful custom jewelry piece designed and handmade by Mark Shimizu from start to finish.

This project began with sourcing a stunning Colombian Emerald, followed by designing the piece, casting the individual components, hand-setting the stones, and carefully polishing and assembling everything into the finished design.

With over 50 years of jewelry-making experience, Mark is one of the few jewelers in Sonoma County who completes the entire jewelry-making process himself — including CAD design, wax carving/3D modeling, metal casting, stone setting, polishing, and finishing.

If you’re looking for custom jewelry in Windsor, CA, want to redesign heirloom jewelry, create a one-of-a-kind ring, or work with a jeweler who can guide your project from concept to completion, we’d love to help.

✨ From custom designs and engagement rings to jewelry repair and estate jewelry, our team is always happy to help with all your jewelry needs.

📍 Mark Shimizu Design
Downtown Windsor, CA
🕙 Tuesday–Saturday | 10 AM–4 PM

What gemstone would be in your dream custom piece? 💎

✨ A custom jewelry piece made completely in-house from start to finish.Mark has been working hard getting caught up on a...
06/09/2026

✨ A custom jewelry piece made completely in-house from start to finish.

Mark has been working hard getting caught up on a backlog of custom projects, and we’re excited to showcase one of his recent finished pieces.
This customer brought in their own gemstones, including this gorgeous Spessartite Garnet, and worked one-on-one with Mark to create a truly custom design. After collaborating closely on the vision, Mark created a 3D model for approval, then moved into production — casting the piece in yellow gold, hand-setting the stones, and polishing/finishing everything by hand right here in our Windsor jewelry store.

There’s something special about creating a piece that is completely unique and designed specifically for one person.

If you’re looking for custom jewelry in Sonoma County, want to redesign heirloom jewelry, reset gemstones, or create a one-of-a-kind engagement ring or fine jewelry piece, we’d love to help.

📍 Mark Shimizu Design
Downtown Windsor, CA
🕙 Open Tuesday–Saturday | 10 AM–4 PM

Have stones sitting in a jewelry box that deserve new life? Stop by and let’s talk design. 💎

Another “YES!” in the books 💍❤️Moments like this are exactly why we love what we do.This gentleman came into Mark Shimiz...
05/27/2026

Another “YES!” in the books 💍❤️

Moments like this are exactly why we love what we do.

This gentleman came into Mark Shimizu Design with a simple idea for an engagement ring, and through collaboration and thoughtful design, Mark was able to personally design and handcraft this dream ring into reality.

Being trusted with something as meaningful as an engagement ring is never something we take lightly. From the first conversation to the finished piece, it’s an honor to help create jewelry that becomes part of someone’s love story.

Congratulations to this beautiful couple, and thank you for letting us be a part of such a special chapter in your lives. 💎

If you’re looking for an engagement ring in Windsor or Sonoma County, we’d love to help bring your vision to life.

💙 Handmade sapphire jewelry in Sonoma County? Yes, please.These beautiful lotus sapphire stud earrings were not only des...
05/15/2026

💙 Handmade sapphire jewelry in Sonoma County? Yes, please.

These beautiful lotus sapphire stud earrings were not only designed by Mark Shimizu, but also handmade by him right here in our Downtown Windsor jewelry store.

Crafted in 14kt white gold and featuring vibrant blue sapphires in a lotus-inspired design, these earrings are elegant enough for special occasions while still being perfect for everyday wear. The detail and sparkle on these are something you truly have to see in person.

If you’re shopping for fine jewelry in Windsor, CA, looking for a meaningful gift, or simply love locally handcrafted jewelry in Sonoma County, stop by and see what makes these so special.

✨ We also offer custom jewelry design, estate jewelry, engagement rings, and expert jewelry repair — all done on-site.

📍 Mark Shimizu Design
9070 Windsor Rd, Windsor, CA
🕙 Open Tuesday–Saturday | 10 AM–4 PM

Would you style these for everyday wear or save them for special occasions?

Hello everyone! We are incredibly excited and honored to share that Mark Shimizu Design has been nominated for Best Jewe...
05/14/2026

Hello everyone! We are incredibly excited and honored to share that Mark Shimizu Design has been nominated for Best Jewelry Store in the Press Democrat’s Best of Sonoma County — FOR THE FIRST TIME EVER! 💎

As a family-owned jewelry store in Downtown Windsor, this nomination means the world to us. We’re so grateful to everyone who has supported our business through jewelry repairs, custom jewelry design, estate jewelry events, and shopping local here in Sonoma County.

🗳 Voting is open now through the 17th, and you can vote once per day. If you’d like to support us, we would truly appreciate your vote!

While you’re voting, we also encourage supporting some other fantastic local Sonoma County businesses:

🌸 Atrellis Flowers & Gifts — Florist
💼 Kara Stewart / FOCUS Strategic Solutions — Financial Advisor
👓 Lyon’s Optometry — Eyeglass Store & Eye Doctor
🍖 Sweet T’s Restaurant + Bar — Caterer
💈 Gentleman’s Barbershop — Barbershop
🍕 PizzaLeah — Pizza

🔗 Vote here:
https://bestofsoco.pressdemocrat.com/

Thank you again for all of the continued support. It truly means everything to our family and small business. ❤️

May calls for emeralds 💚This beautiful pear-cut emerald and diamond halo necklace is one of our favorite pieces currentl...
05/13/2026

May calls for emeralds 💚

This beautiful pear-cut emerald and diamond halo necklace is one of our favorite pieces currently in the showroom at Mark Shimizu Design in Windsor, CA.

Crafted in 14kt white gold, this modern necklace features a vibrant pear-shaped emerald surrounded by a delicate diamond halo for the perfect balance of elegance and sparkle. Whether you’re shopping for a meaningful gift, a birthstone piece, or simply love timeless fine jewelry, this necklace is a standout.

✨ 14kt white gold
✨ Pear-cut emerald
✨ Diamond halo setting
✨ $1,113

If you’re looking for emerald jewelry in Sonoma County or unique fine jewelry in Windsor, stop by and take a look in person.

📍 Mark Shimizu Design | Windsor, CA

05/12/2026

One of the biggest jewelry myths is that less metal means more sparkle. 💎

Many people assume that open settings automatically make a diamond sparkle more, but a diamond’s brilliance actually comes from the quality of its cut and polish and how well it reflects light back to your eye.

That means bezel settings and other styles with more metal around the stone can still sparkle beautifully when paired with a well-cut diamond. In fact, bezel settings are a great option for people with active lifestyles or anyone who works a lot with their hands because they offer extra protection for the stone while still looking elegant and modern. ✨

If you’re engagement ring shopping in Windsor or Sonoma County and want help finding the right style for your lifestyle, stop by and see us in person. We’re always happy to talk jewelry and help educate you on the differences between settings, metals, and diamond cuts.

📍 Mark Shimizu Design — Downtown Windsor, CA
💍 Custom Jewelry • Jewelry Repair • Estate Jewelry • Engagement Rings

Do you prefer bezel settings or traditional prong settings? Let us know in the comments! 👇

Happy Mother’s Day from all of us at Mark Shimizu Design! 💐💎Today is the FINAL DAY of our Estate Jewelry Trunk Show in D...
05/10/2026

Happy Mother’s Day from all of us at Mark Shimizu Design! 💐💎

Today is the FINAL DAY of our Estate Jewelry Trunk Show in Downtown Windsor featuring the stunning collection of Christoffel & Family Estate Jewelry.

If you’re looking for a special Mother’s Day activity in Sonoma County, stop by and explore a beautiful collection of vintage jewelry, antique rings, estate diamonds, heirloom-quality pieces, and one-of-a-kind fine jewelry from across every era. Whether you’re shopping for Mom, spending time together, or treating yourself to something timeless, this is your last opportunity to see this incredible collection in person.

As a family-owned jewelry store in Windsor, CA, we love bringing unique estate jewelry events like this to the community and helping people discover pieces filled with history, craftsmanship, and character.

📍 Mark Shimizu Design
9070 Windsor Rd, Windsor, CA
🕚 Open Today (Mother’s Day): 11 AM – 4 PM

Come celebrate Mother’s Day in Downtown Windsor and shop local before the trunk show ends! ✨

Address

9070 Windsor Road
Windsor, CA
95492

Opening Hours

Tuesday 10am - 4pm
Wednesday 10am - 4pm
Thursday 10am - 4pm
Friday 10am - 4pm
Saturday 10am - 4pm

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