TUE - FRI 11:30 AM - 6.00 PM, SAT 11:30 AM - 5:30 PM (Appointments Recommended)

MSD Company LogoMSD Company Title

Diamond Services

The Only Diamond Cutter in DC

Market Street Diamonds bridal rings
Market Street Diamonds bridal rings

Starting its journey as a custom jewelry designer and manufacturer over a century ago, Market Street Diamonds has expanded its services as a full gemological service provider since 2009. At present, we are the only diamond cutter in the mid-Atlantic region.

Dino Lonzano, our Chief Gemologist, heads our team of GIA certified diamond professionals who are ready to assist you in all gemological needs. Our gemological lab is equipped with the latest ultra-precision machined and equipment you can rely on for our services' quality.

Whether your diamond is damaged one, heirloom vintage cut, or even if it is a rough diamond, our master diamond cutters can optimize its value and appearance. We can also accurately analyze and pre-grade diamonds and gemstones and get them certified through reputed partner gemological labs.

Diamond / Gemstone cutting

Diamond Repair/Re-cutting

Diamond Polishing

Rough Diamond Analysis

Diamond / Gemstone Analysis

Custom Laser Inscribing

Removing Inscriptions

Removing Inscriptions

Diamond Sorting

Meet our Master Gemologist

Dino Lonzano, Master Gemologist

Dino Lonzano G.G.(GIA),MBA

Our Master Gemologist, Dino Lonzano, is a Gemological Institute of America graduate in Diamond Essentials, Colored Stone Essentials, Jewelry Essentials, Gem Identification, and Colored Stone Grading. Dino was born into the business and grew up helping his dad and uncles at their Silver Spring, Maryland, shops with jewelry creations and luxury watch repair. With more than four decades of experience, Dino has seen, cut, and valued millions of dollars of diamonds and colored stones.

"Your concept, our Expertise,
Together We Create!"

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Read what our clients say about us
Market Street Diamonds Gemological ServicesMarket Street Diamonds Gemological ServicesMarket Street Diamonds Gemological ServicesMarket Street Diamonds Gemological Services
Dino Difference

Dino Difference

Red Carpet Customer Care

4D Design Approach

Respect & Empathy

Boutique Experience

Fifth C is for Conflict Free

Conflict Free Diamonds

We are the first in the industry to promote ethical sourcing

Echo friendly enterprise

Eco-Conscious Enterprise

We care for the planet we live, & committed to find greener ways to create value