Custom
Engagement Rings 

Custom-designed
engagement Rings in Petaluma, CA

At Lauren O Jewels, we specialize in creating custom-designed engagement rings that capture your love story through craftsmanship, precision, and artistry. Located in the heart of Petaluma, CA, our private jewelry studio serves clients throughout Sonoma County, Marin County, and the greater Bay Area.

Every engagement ring we design is one-of-a-kind, handcrafted to reflect your personal taste and lifestyle. Whether you envision a classic solitaire, a vintage-inspired halo, or a modern setting featuring natural diamonds or sapphires, we guide you through each step of the design process with expertise and care.

With more than 65 years of combined experience in fine jewelry and gemstone sourcing, Lauren and Terry O’Sullivan offer a level of personal service and technical mastery that defines Lauren O Jewels as Petaluma’s trusted private jeweler.

Our Process

CAD Design

My goal is to help you create the ring of your dreams.  It is a collaborative effort to create a piece that fits your lifestyle, will last a lifetime and includes design elements that light you up.  I strive to listen and understand my clients design ideas and then help them come to life.

Using CAD (Computer-Aided Design), we create detailed digital renderings that bring your vision to life before production begins. This process allows you to preview your ring from every angle, ensuring precision in proportion, comfort, and structure before casting.

Select

Your Diamond or Stone

  • • Learn about the 4 C’s—cut, color, clarity, and carat weight—in a relaxed, educational setting.

  • Compare natural diamonds and colored gemstones such as sapphires, emeralds, and rubies.

  • Explore brilliance, sparkle, and shape with expert guidance from gemologists who prioritize transparency and education.

  • Discover ethical sourcing options and fine-quality stones selected for beauty and long-term value.

Our goal is to make each step educational, personal, and customized to your preferences.

Custom DESIGN

CAD Renderings

After your gemstone is chosen, we refine the design to perfection. Whether your style leans timeless or modern, our CAD renderings let you see every detail of your ring before it’s crafted, so you can make small adjustments to the design before it is cast. We review proportions, prong styles, and overall balance together, ensuring your finished ring feels uniquely yours.

Finished Ring

Your final design, brought to life!

Your final design is handcrafted in gold, platinum, or another precious metal of your choice. Each piece passes multiple quality-control stages before presentation.
When you see the finished ring for the first time, you’ll know it was made specifically for you — a one-of-a-kind creation that captures your story.

"My engagement ring is truly perfect.

Somehow Lauren and my fiancé were able to design and create the ring
of my dreams without me even knowing what I wanted myself."

- CAEDMON P.

Finished Ring

Your final design, brought to life!

"My engagement ring is truly perfect.

Somehow Lauren and my fiancé were able to design and create the ring
of my dreams without me even knowing what I wanted myself."

- CAEDMON P.

Get Started

FREE private consultationS for engagement rings

Schedule Appointment

How Can We Help You?

Whether you're located in Petaluma, Santa Rosa, Novato, Sonoma, Kentfield & Ross, San Rafael, Marin County, or San Francisco, you can trust Lauren O Jewels for beautifully crafted, custom-designed engagement rings and anniversary jewelry.