K & Co. Family Jewelers recognizes the significance of working on a cherished family heirloom or bringing a new piece home, and have been guiding visitors through their selections for over three decades. Following in the footsteps of the Neciuk family legacy, Richard & Katrina Neciuk draw from over 70 years of wisdom and experience in their pursuit of offering the best service possible.

Presenting a limitless selection of engagement rings, bridal jewelry, fine diamond fashions, unique gemstone jewelry, and watches, their variety assures the satisfaction of any taste within the Brentwood, Oakley, Clayton, Discovery Bay, Mountain House, and surrounding areas. Come in today and see for yourself.


Jewelry Repair/Custom Design

We are proud to work on your jewelry, whether its a custom designed piece or restoring a family heirloom. We will be sure to take extra care of whatever your needs are.


Watch Repair

Our shop provides simple services such as watch battery replacement while you wait bracelet adjustment, as well as full service watch over hauls and restoration. All repairs performed with certified parts ensuring your timepiece will continue to keep accurate time for years to come.


Our Staff

Rich Neciuk - Owner & Master goldsmith/bench jeweler
Katrina Neciuk - Owner & Jewelry & fashions buyer
Anna London - Production Manager/ Jewelry Designer Andrew Neciuk - Sales Associate/Bridal Consultant



All repairs and custom work guaranteed to last, providing 1 year warranties on all watch repairs and conditional lifetime warranties on custom design and jewelry repair. Everyday wear and tear does not constitute poor craftsmanship.