Business Details
14 Years
experience
Custom Diamond Jewelry Design in Sacramento
At Jonathan K. & Co Fine Jewelry. & Co Fine Jewelry, we believe that every piece of jewelry should be as unique as the individual wearing it. With over two decades of experience in the diamond industry, our founder Jonathan K. & Co Fine Jewelry. & Co Fine Jewelryozycz has cultivated a reputation for creating custom designs that reflect personal style and enduring quality. Our Sacramento-based boutique offers a full range of services including custom design, diamond certification, and jewelry repair, all executed with meticulous attention to detail. Jonathan's journey began at age 14 in his family's jewelry store, where he mastered bench jewelry and diamond sales before establishing his own business. We specialize in GIA-certified diamonds of 2 carats and above, ensuring transparency and ethical sourcing for every client. Our commitment to personalized service means working closely with customers to transform their visions into wearable art, whether through engagement rings, heirloom restoration, or bespoke fashion pieces.The team takes pride in maintaining long-term relationships with clients, evidenced by our growing base of repeat customers who trust our expertise and integrity. From initial consultation to final delivery, we prioritize clear communication, budget-conscious solutions, and craftsmanship that meets the highest industry standards. Our on-site bench jeweler handles repairs, ring sizing, and restorations with the same precision applied to our custom creations. By combining traditional techniques with modern technology like 3D CAD design, we ensure every piece meets exacting specifications while remaining uniquely personal.
Services
Custom Jewelry Design
Diamond Certification
Jewelry Repair
Appraisals
Estate Jewelry Buying
Details
- Year established: 2012
Highlights and features
- We offer personalized custom jewelry design with 3D CAD visualization
- Our GIA-certified diamonds ensure quality and ethical sourcing
- On-site bench jeweler provides expert repairs and restorations
- Decades of experience in diamond industry and custom craftsmanship
- Transparent pricing and budget-conscious solutions for every client
Associations and certifications
- GIA
What people say
Stunning piece
Unbeatable prices
Patient service
Quality craftsmanship
Ethical sourcing
Services
Custom Jewelry Design
Transform personal visions into unique jewelry through collaborative design. Using 3D CAD technology and traditional techniques, we craft one-of-a-kind pieces from concept to completion. Clients receive multiple diamond options and detailed prototypes for approval before final production.
Diamond Certification
Verify authenticity and quality of diamonds through GIA-certified evaluation. Our experts provide detailed documentation of carat, cut, color, and clarity characteristics. This service ensures transparency and maintains value for investment-grade stones.
Jewelry Repair
Professional restoration of damaged or worn pieces by master bench jewelers. Services include ring resizing, prong replacement, pearl restringing, and heirloom preservation. We maintain original design integrity while enhancing structural durability.
Appraisals
Accurate valuation of jewelry for insurance, estate planning, or resale purposes. Our certified appraisers document detailed specifications, market comparisons, and current worth. Reports meet industry standards for legal and financial documentation.
Estate Jewelry Buying
Fair evaluation and purchase of pre-owned diamonds, gold, and fine jewelry. We offer competitive rates based on material value and market conditions. The process includes professional assessment and immediate payment for accepted items.
People
Jonathan Kozycz
Owner & Lead Designer
With 20+ years in the jewelry industry, Jonathan began as a bench jeweler at 14, became a diamond sales expert, and established his Sacramento boutique in 2012. He specializes in ethical sourcing and custom designs that reflect clients' personal stories.
Questions
How does the custom jewelry design process work?
We begin with a consultation to understand your vision, followed by 3D CAD design creation. After revisions and final approval, we source GIA-certified diamonds and craft the piece in our Sacramento workshop.
Do you only work with engagement rings?
While we specialize in engagement rings, we create all types of custom jewelry including wedding bands, fashion pieces, heirloom restorations, and personalized gifts for special occasions.
What diamond sizes do you offer?
We specialize in GIA-certified diamonds of 2 carats and above, but can source stones of various sizes to meet specific design requirements and budget considerations.
Can you repair vintage jewelry?
Yes, our master bench jewelers handle vintage restoration while preserving original craftsmanship. Services include prong replacement, engraving restoration, and structural reinforcement for heirloom pieces.
Do you provide jewelry appraisals?
We offer certified appraisal services documenting value, quality characteristics, and market comparisons for insurance, estate planning, or resale purposes using industry-standard evaluation methods.
What payment options are available?
We accept major credit cards, bank transfers, and offer financing options for qualified purchases. Payment plans can be arranged for custom orders exceeding $1,000 with prior approval.
