Business Details
Your Trusted Jewelry Store in Commack, NY
At Keepsake Diamonds, we have dedicated ourselves to serving the jewelry needs of Long Island residents for over four decades. As a family-owned business now in its fourth generation, we combine inherited expertise with modern techniques to offer exceptional service. Our certified diamontologist, John, personally selects every diamond to ensure quality while providing expert guidance through every purchase or custom design. We specialize in engagement rings, wedding bands, and diamond jewelry, complemented by same-day repairs and heirloom repurposing. Our commitment to customer satisfaction is reflected in our personalized approach, competitive pricing, and the trust built through generations of service.We pride ourselves on delivering the quality and expertise of Manhattan's Diamond District without requiring a trip to the city. Our team handles every repair, appraisal, and custom request with meticulous care, ensuring lasting value for every client. This dedication to excellence has established us as a trusted name in Commack and surrounding areas. We invite you to experience the difference of working with professionals who treat every piece as if it were their own family heirloom. Our store remains a destination where tradition meets innovation in fine jewelry craftsmanship.
Services
Engagement Rings
Wedding Bands
Custom Jewelry
Jewelry Repairs
Diamond Selection
Highlights and features
- Fourth-generation family business with 40+ years of jewelry expertise
- Certified diamontologist personally selects every diamond for quality
- Same-day jewelry and watch repairs completed in-store
- Custom design services for unique engagement rings and wedding bands
- GIA-certified diamonds guarantee authenticity and value
Associations and certifications
- Gemological Institute of America (GIA)
What people say
Very professional
Knew exactly what she would want
Exceptional to work with
Accommodating throughout the process
In love with my band
Services
Engagement Rings
Our engagement ring collection features GIA-certified diamonds in various settings, from classic solitaires to custom designs. John's expertise ensures quality selection while considering the Four Cs. We help create meaningful symbols of commitment that reflect personal style and budget.
Wedding Bands
We offer matching or contrasting wedding bands in gold, platinum, and alternative metals. Our specialists guide couples through metal choices, finishes, and customization options. Every band receives meticulous attention to ensure perfect fit and lasting comfort for lifelong wear.
Custom Jewelry
Transform ideas into unique jewelry through our custom design process. Clients can create from scratch, incorporate heirloom stones, or modify existing pieces. Our team handles every detail from concept sketches to final craftsmanship, ensuring one-of-a-kind creations with personal significance.
Jewelry Repairs
Our in-house experts perform same-day repairs including ring sizing, stone setting, and watch maintenance. We handle delicate work with precision, whether restoring damaged heirlooms or maintaining everyday wear pieces. Complimentary cleaning ensures jewelry maintains its original brilliance.
Diamond Selection
Browse our collection of certified diamonds and semi-precious stones for any occasion. John explains the Four Cs to help select perfect stones for engagement rings, anniversary gifts, or personal treasures. Every diamond comes with documentation verifying quality and value.
People
John
Owner & Certified Diamontologist
Fourth-generation jeweler with 40+ years of experience, John specializes in diamond evaluation and custom design. He personally selects every stone while guiding clients through creating meaningful jewelry pieces for life's special moments.
Questions
What jewelry services do you offer?
We specialize in engagement rings, wedding bands, custom jewelry design, same-day repairs, and diamond selection. Our services also include watch maintenance, heirloom restoration, and GIA-certified diamond consultations.
Can you create custom engagement rings?
Yes, our custom design service helps create unique engagement rings from scratch, using heirloom stones, or modifying existing designs. John works closely with clients to develop personalized symbols of commitment.
Do you repair jewelry purchased elsewhere?
We repair all types of jewelry regardless of where originally purchased. Our in-house experts handle sizing, stone setting, cleaning, and restoration with the same care as our own merchandise.
Are your diamonds certified?
All our diamonds come with GIA certification, ensuring quality through independent evaluation of cut, color, clarity, and carat weight. Certification documents verify each stone's characteristics and value.
What are your business hours?
We're open Wednesday 10AM-6PM, Thursday 10AM-7PM, Friday 10AM-6PM, Saturday 10AM-6PM, and Sunday 10AM-6PM. Closed Mondays and Tuesdays for in-store appointments only.
