Diamond Engagement Rings & Wedding Bands
Since 1906
Dino Lonzano creates custom jewelry designs in a dynamic range of styles, from classic to contemporary, to cutting edge. At Market Street Diamonds, everything is handmade in-house.
An Awe-inspiring & Unique Engagement Ring Collection
#MadeInDC
#MadeWithLove
#MadeInTheUSA
Hours:
TUE -FRI 11:30AM -6:00PM,
SAT 11:30 AM- 5:30 PM
(Appointments Recommended)
Create a custom engagement ring with Dino Lonzano
The perfect custom engagement ring design takes imagination and artistry, and an open, honest and trusting relationship between designer and client. Making that design a reality takes immaculate craftmanship and precision. Nobody knows this process like Dino Lonzano and the GIA-trained team of jewelry professionals and gemologists at Market Street Diamonds.
4. Crafting
5. Your Ring
6. Your DayWedding Bands
The Ultimate Symbol of your Love
Create the wedding band in perfect match to your engagement ring, and the band for him that brings the synergy of love into a beautiful bond of two souls.
Discover your dream wedding ring from our exclusive collection of eternity bands, diamonds ring rings bearing rich assortment of classic and modern styles, or build your own unique ring with us.
Market Street Diamonds
Your imagination. Our creation.
Enjoy the most exclusive diamond jewelry collection in the nation's capital, handmade in the USA.
Browse the most exclusive diamond jewelry collection in the nation's capital, all handmade in the USA. Select from designs in a multitude of styles, from vintage to modern, or use your imagination and allow Dino Lonzano to create a custom piece that's truly one-of-a-kind.
From our distinctive diamond engagement rings to timeless handcrafted jewelry, we'll show you stunning options that don't just commemorate, but elevate any occasion or emotion. Whether it's an engagement, a wedding, an anniversary or a self-congratulatory whim, Market Street Diamonds can help to make it uniquely unforgettable. Whether you're looking for necklaces, pendants, bracelets, earrings or rings, count on the rarest quality and unparalleled precision. Whether you're interested in diamonds, sapphires, rubies, emeralds, tanzanite, tourmaline or South Sea pearls, we have the finest on the planet. And whether you want 18-karat gold, palladium or platinum, no one delivers like Dino Lonzano.
Visit the Market Street Diamonds showroom and jewelry studio, conveniently located at the gates of Georgetown, and let us introduce you to Dino Lonzano and his designs. Dino and his GIA-trained team of passionate professionals will assist you in locating or creating that intimately personal, breathtakingly beautiful and enduringly memorable treasure you've been dreaming of.
Why Market Street Diamonds?
Red Carpet Customer Care
The Highest Rated Local Jeweler in DC
Boutique Experience
4D Design Approach
Respect & Empathy
Originality
One-of-a-kind Personalized Experience
Red Carpet Customer Care
The Highest Rated Local Jeweler in DC
Boutique Experience
4D Design Approach
Respect & Empathy
Originality
One-of-a-kind Personalized Experience
Forever Care & Share Program
Free upkeep every 6 month of your diamond ring
Your satisfaction is an investment & our referral program lets you earn your returns.
Learn more >
Forever Care & Share Program
Free upkeep every 6 month your diamond ring
Your satisfaction is an investment & our referral program lets you earn your returns.
Learn more >
We Create In-house
Proudly #MadeInDC
Quenchless Passion for Originality since 1906
Diamond & Gemstone Cutting
We Create In-house
Proudly #MadeInDC
Quenchless Passion for Originality since 1906
Diamond & Gemstone Cutting
Jewelry & Watch Services
We are a full-service jeweler & the only diamond cutter in the region
Jewelry & Watch Services
We are a full-service jeweler & the only diamond cutter in the region
Jewelry Appraisals 
As a manufacturer to the trade, Institutions, and retail consumer coupled with years of global sourcing provides a natural edge of substantial experience. Excited to be the only jeweler in DC with the AGS (American Gem Lab) credentials and a minimum of three GIA (Graduate Gemologists) professionals available to you on any given workday. Our appraisals are respected by all Insurance companies foreign and domestic. We welcome you for a complimentary analysis consultation.
Custom Jewelry Designs
We design and handcraft unique custom jewelry pieces that you dream of. When you bring your design ideas to us, our professional jewelry designers will be working in person with you in a synergistic creative process. You will see your idea comes to life, completing a journey from a 3D model to the actual piece.
CAD/WAX Designs
Our partnerships and investment in sophisticated international technology affords us a reputation as leaders in conceptual 3D design. Imagine a concept brought to life in high resolution quality natural 3D images, and a physical wax resign model for you to try on. Our services are limitless. Your imagination. Our creation.
Watch Appraisals
Master Horologists via AWCI (The American Watchmakers-Clockmakers Institute) approved watchmaker. We provide appraisals for all brands of luxury timepieces.
Watch Repair/Restoration
Master Horologists via AWCI (The American Watchmakers-Clockmakers Institute) approved watchmaker. From simplest needs such as battery replacements, strap adjustments to complete overhauls of your luxury timepieces, you can get it done from our watch department.
Jewelry Repair/Restoration
We are one of the few full-service jewelry stores in the region with an in-house designing studio and a manufacturing facility. We do all kinds of jewelry repairs and restorations, may it be simple prong tightening or turning your jewelry piece to a new design. Cleaning and polishing are done while you wait.
Laser Inscription/Engraving
You can get your custom message engraved into your diamond girdle or on the ring itself with us. We provide laser or manual inscriptions to all jewelry or any other items made with gold, platinum, or silver.
