Custom Engagement Rings
Designed around your story and your stone. We guide you from inspiration to a ring that exists nowhere else in the world.
Redwood City · Family-Owned · Crafting Since 1982
Forever, handcrafted
in fine detail.
For over four decades, Carlos and the Blue Diamond family have designed one-of-a-kind engagement rings and bespoke jewelry — created entirely in-house, for the moments that matter most.
Designed & Made In-House
What We Create
The Craft of Blue Diamond
From the first sketch to the final polish, every service is performed by our own jewelers — never outsourced. This is jewelry made the way it was in 1982.
Custom Jewelry Design
Pendants, earrings, bracelets and heirlooms — conceived with you and brought to life at our bench in Redwood City.
Jewelry & Watch Repair
Expert restoration of fine jewelry and timepieces. Prongs, clasps, movements and stones — handled with care.
Ring Resizing
Precise, seamless resizing that preserves the integrity and finish of your ring — usually while you wait.
Appraisals
Detailed, professional appraisals for insurance, estate and resale — backed by four decades of expertise.
Restyling
Reimagine inherited or dated pieces into something you'll wear every day — keeping the sentiment, refreshing the design.
Selected Work
A Gallery of the Made-to-Last
A glimpse of recent custom pieces and restorations from our bench.
Why Blue Diamond
A family name
built on trust.
Founded in 1982, Blue Diamond Jewelry is a fixture in Redwood City — a place where neighbors become clients, and clients become family. Owner Carlos still works the bench personally, just as he did on day one.
We don't send your jewelry away. Everything is designed, made, repaired and appraised in-house, by people who put their name on the work. That's how a piece becomes an heirloom.
— CarlosOwner · Master Jeweler
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Years In Business
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Made In-House
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Signature Services
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Serving Since
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Visit The Studio
On Woodside Road,
in the heart of Redwood City.
Stop by for a no-pressure consultation. Whether you're dreaming up an engagement ring or bringing in a treasured piece, we'd love to meet you.
- Address1601 Woodside Rd
Redwood City, CA 94061 - Phone(650) 364-3653
- HoursMon–Fri · 10am – 6pm
Sat · 10am – 3pm · Sun · Closed
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Blue Diamond Jewelry
1601 Woodside Rd · Redwood City, CA 94061
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Request a Consultation
Tell us what you have in mind. Carlos will personally follow up to talk through your vision — no obligation.