Made in USA logo

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

For the safety of our customers and associates, we will continue our COVID 19 policies until December 31, 2021

Mask
Required

Safe
Distance

Temperature Checks

Regular Sanitizing

(Masks will be provided if needed)

Art Deco Engagement Rings Art Deco Engagement Rings Art Deco Engagement Rings Art Deco Engagement Rings
Art Deco Engagement Rings Art Deco Engagement Rings
Art Deco Engagement Rings Art Deco Engagement Rings

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.

Made in DC logo

#MadeInDC

Made in USA logo

#US Made

Showroom & Studio

2512 Pennsylvania Avenue NW,

Washington, DC 20037

Get Direction

Hours:

TUE -SAT 12:00PM -5:00PM

(Appointments Recommended)

Contact

(202) 552 5744

RedBox@marketstreetdiamonds.com

Book an Appointment

An Awe-inspiring & Unique Engagement Ring Collection

Custom Engagement Rings Made in DC

1. Consultation Step 1 - Consultation
2. CAD Design Step 2 - CAD design
3. Wax Model Step 3 - Wax Model
Art Deco Engagement Rings 4. Crafting
Step 4 - Crafting your ring 5. Your Ring
An MSD couple engagement photo 6. Your Special Day

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

(Appointment Recommended)

Book an Appointment

Showroom & Studio:

2512 Pennsylvania Avenue NW,

Washington, DC 20037

Get Direction

Read client reviews

Browse our fine jewelry collection

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.

MSD couple on their wedding day
MSD couple on their wedding day
MSD couple on their wedding day
MSD couple on their wedding day
MSD couple on their wedding day

Why Market Street Diamonds

There are few things we do different

MSD jewelry professionals working with clients

Red Carpet Customer Care

The Highest Rated Local Jeweler in DC

Boutique Experience

4D Design Approach

Respect & Empathy

Originality

Red Carpet Customer Care

The Highest Rated Local Jeweler in DC

Boutique Experience

4D Design Approach

Respect & Empathy

Originality

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 >
Watch makers at Market Street Diamonds

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 >
Buy luxury watches at Market Street Diamonds

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

Appraisals

Jewelry & Watch Appraisals

Insurance/Replacement Value

Liquidation Appraisals

Estate Appraisals

GIA certified Team

Book Now

Bridal Services

Engagement Ring Consultation

Custom Designs

Wedding Band Consultation

Diamond Consultation

Flexible Financing Options

Book Now

Jewelry Services

Custom Design & Manufacturing

CAD & WAX Model Services

Engraving

Gold & Platinum Recycling

We Buy Gold Program

Book Now

Jewelry Repair

Cleaning, Polishing, & Plating

Resizing, & Adjustments

Vintage Jewelry Restoration

Resetting & Replacing Stones

Rebuilding & Tightening Prongs

Book Now

Watch Services

Battery Replacement

Watch Overhauling

Repairs & Replacements

Watch Appraisals

Strap Adjustments & Replacements

Book Now

Gemological Services

Diamond Cutting and Re-cutting

Diamond Grading

Rough Diamond Analysis

Gemstone Cutting & Polishing

Laser Inscribing

Book Now

Special Services

Custom Gift Designing

Diamond/Gemstone Scanning

3D Printing

Jewelry/Diamond Imagery

Diamond Buying Program

Book Now

Jewelry & Watch Services

We are a full-service jeweler & the only diamond cutter in the region

Jewelry Appraisals Jewelry Appraisal

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 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

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 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 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 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.

Dino Difference

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