We are open Tuesday through Saturday,
12:00 p.m. to 5:00 p.m. (Appointments Recommended)

We are open Tuesday through Saturday, 12:00 p.m. to 5:00 p.m. (Appointments Recommended)

Diamond Engagement Rings & Wedding Bands Since 1906

Dino Lonzano creates custom jewelry designs in the broadest range of styles, from classic to contemporary to cutting edge. At Market Street Diamonds, everything is handmade in-house.

COVID-19 Safety Precautions

Mask Required

Safe Distance

Temperature Checks

Regular Sanitizing

Bridal Services Bridal Services Bridal Services

Market Street Diamonds

Custom Engagement Rings made in DC

Enjoy the most exclusive diamond jewelry collection in the nation's capital, handmade in the USA.

Your imagination. Our creation.

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.

Market Street Diamonds Team
Market Street Diamonds Storefront
Market Street Diamonds Interior
Market Street Diamonds Interior
Market Street Diamonds Interior
Market Street Diamonds Interior
Market Street Diamonds Interior
Market Street Diamonds Interior
Market Street Diamonds Interior
Alt Text!

#MadeInDC

Alt Text!

#US Made

Alt Text!

Red Carpet
Customer Care

Alt Text!

Eco Conscious
Enterprise

COVID-19 Safety Precautions

Mask Required

Safe Distance

Temperature Checks

Regular Sanitizing

Fresh from the Bench

Discover our latest creations

Market Street Diamonds Jewelry
Market Street Diamonds Jewelry
Market Street Diamonds Jewelry
Market Street Diamonds Jewelry
Market Street Diamonds Jewelry
Market Street Diamonds Jewelry
Market Street Diamonds Jewelry
Market Street Diamonds Jewelry
Market Street Diamonds Jewelry
Market Street Diamonds Jewelry
Market Street Diamonds Jewelry

Fresh from the Bench

Discover our latest creations

An Awe-inspiring & Unique Engagement Ring Collection

Custom Engagement Rings Made in DC

Visit Us

Custom Engagement Rings Made in DC

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.

Business Hours:

Tue - Sat 12:00 PM to 5:00 PM
(Appointments Recommended )

Make an Appointment

Showroom & Studio:

2512 Pennsylvania Avenue NW,
Washington, DC 20037

Get Directions

Read clients' reviews:

Browse our Collections

Your Imagination is our Creation

Create Custom Engagement Ring

Your Imagination is our Creation

A perfect custom engagement ring design needs virtuoso artistry, a seamless client-designer dialog, and immaculate craftsmanship. This is what we do best.

The Process

Close Art Deco Engagement Rings
1. Consultation Art Deco Engagement Rings 2. CAD Design Art Deco Engagement Rings 3. Wax Model Art Deco Engagement Rings
Art Deco Engagement Rings 4. Crafting Art Deco Engagement Rings 5. Your Ring Art Deco Engagement Rings 6. Your Special Day

Wedding 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 Custom Weddingbands

Why Market Street Diamonds

There are few things we do different

Red Carpet Customer Care

Genuine 5-Star reviews do come for the best

Red Carpet Customer Care

The Highest Rated Local Jeweler in DC

Boutique Experience

4D Design Approach

Respect & Empathy

Originality

More about Dino Difference >

Forever Care & Share Program

Lifetime Care

Free upkeep every 6 month your diamond ring

Learn more >

Dino Dollars

Your satisfaction is an investment & our referral program lets you earn your returns.

Learn more >

Red Carpet Customer Care

5 Star Ratings by Professionalism & Candor

We Create Things In-house

#MadeinDC with 114 years of Artistry
& state of the art technology

We Create Things In-house

Proudly #MadeInDC

Quenchless Passion for Originality since 1906

Modern Design Studio with State-of-the-Art Technology

Diamond & Gemstone Cutting

GIA Certified Team of Professionals

The Studio >

Jewelry & Watch Services

We are a full-service Jeweler
& the only Diamond Cutter in the Region

Jewelry Appraisals Jewelry Appraisal

We perform jewelry appraisals all kinds of jewelry accepted for insurance, liquidation, and other legal proceedings. One of our GIA graduate gemologists will take measurements and pictures of your item on the shop floor while you can keep your eyes on your precious piece. Ther is NO need to leave the jewelry with us. The appraisal will be emailed to you in 2-business days.

Custom Jewelry Designs 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 CAD/WAX Designs

We have a team of top-notch 3D model designers ready to work with you on computer-aided design (CAD) of any complexity. Our studio is equipped with state of the art 3-D printers to turn your designs into wax models.Also, for more intricate designs, we provide handmade wax model services.

Watch Appraisals Watch Appraisals

We are an AWCI (The American Watchmakers-Clockmakers Institute) approved watchmaker. We provide appraisals for all brands of luxury timepieces.

Watch Repair/Restoration Watch Repair/Restoration

We are an 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 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 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.

Appraisals

  • Jewelry & Watch Appraisals
  • Insurance/Replacement Value
  • Liquidation Appraisals
  • Estate Appraisals
  • by GIA certified Team

Bridal Services

  • Engagement Ring Consultation
  • Custom Designs
  • Wedding Band Consultation
  • Diamond Consultation
  • Flexible Financing Options

Jewelry Services

  • Custom Design & Manufacturing
  • CAD & WAX Model Services
  • Engraving
  • Gold & Platinum Recycling
  • We Buy Gold Program

Jewelry Repair

  • Cleaning, Polishing, & Plating
  • Resizing, & Adjustments
  • Vintage Jewelry Restoration
  • Resetting & Replacing Stones
  • Rebuilding & Tightening Prongs

Watch Services

  • Battery Replacement
  • Watch Overhauling
  • Repairs & Replacements
  • Watch Appraisals
  • Strap Adjustments & Replacements

Gemological Services

  • Diamond Cutting & Re-cutting
  • Diamond Grading
  • Rough Diamond Analysis
  • Gemstone Cutting and Polishing
  • Laser Inscribing

Specialty Services

  • Custom Gift Designing
  • Diamond/ Gemstone Scanning
  • 3D Printing
  • Jewelry/ Gemstone Photography
  • Diamond Buying Program

Dino Difference

Contact Us

Get Exclusive Offers and News