Fast. Simple. Secure.

Jewelry Buyer in St. Louis

Experience a smarter way to sell your jewelry. Our expert buyers personally evaluate every piece submitted to ensure you receive exceptional value and service.

Tell us about your item, include a few photos, and one of our experts will reach out shortly.

Have questions? Message our team now.

Mia Cossey
St. Louis, MO Market Director
314-876-6659
stlouis@diamondbanc.com
Book Appointment

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Mia Cossey
St. Louis, MO Market Director
314-876-6659
stlouis@diamondbanc.com
Book Appointment

“We understand your jewelry is more than just an asset. Our team is here to provide you with secure, personalized financial solutions.”

Mills Menser
Owner and Founder

Featured in Featured in Forbes

St. Louis’s Premier Jewelry Buyer

Sell Your Fine Jewelry
Designer pieces by Tiffany & Co., Cartier, David Yurman, Graff, Harry Winston, etc., or high-value fine jewelry of any type.
Sell Your Engagement Ring
Diamond engagement rings, wedding bands, complete wedding sets, etc.
Sell Your Loose Diamonds
Individual diamonds of 0.50ct or larger. Certified or un-certified. Receive a free evaluation for your diamonds.
Sell Your Luxury Watches
Rolex, Cartier, Breitling, Omega, Tag Heuer, etc.
Sell Your Gold and Silver
Coins or bullion.
Sell Your Jewelry on Consignment
Diamonds, diamond jewelry, signed designer pieces, and luxury watches.

Visit One Of Our Diamond Banc Locations:

Diamond Banc Affiliate Locations:

Perry’s Jewelers | Roswell, Georgia
Capetown Diamond Corporation | Charlotte, North Carolina
Mann’s Jewelers | Rochester, New York

Meet Our St. Louis, MO Market Director

Mia Cossey

With over 13 years of distinguished experience in the jewelry industry, Mia Cossey leads Diamond Banc of St. Louis with a commitment to delivering premier service and unparalleled expertise. As a Certified Diamontologist and GSI Diamond Essentials professional, Mia combines technical knowledge with a deep understanding of the luxury jewelry market. Her previous role as Store Manager at Signet Jewelers in St. Louis underscores her dedication to exceptional client care and operational excellence, managing everything from quality control to client repairs and high-value transactions. At Diamond Banc, Mia’s client-centered approach ensures each interaction is transparent, informed, and tailored to meet clients’ unique financial needs.

314-876-6659 stlouis@diamondbanc.com Book Appointment Get a Quote