Diamond Services

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 Lozano, 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 ultraprecision 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.

Meet our 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 shops in Silver Spring, Maryland with jewelry creations and luxury watch repair. Now with more than four decades of experience, Dino has literally seen, cut, and valued millions of dollars’ worth of diamonds and colored stones.