Diamond Seller's Agent

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From The Founder

FAQs

Sell Your Diamond for More with Diamond Banc’s Seller’s Agent Service

We actively market your diamond to a national audience. Once your diamond is sold, we pay you the preferred selling price that was initially established. We handle all the logistics necessary to maximize your diamond’s value and desirability before it is offered for sale. This approach ensures that we share the goal of maximizing the value of your diamond. We are not compensated for our efforts until you are.

Maximize Your Earnings

• Earn 15% more than our immediate purchase offer for your item.
• Receive an interest-free advance of up to 50% of our original purchase offer, up to $25,000.

Selling Timeline & Terms

• 20-business-day selling window to achieve the target proceeds.
• If your item doesn’t sell within 20 days, you have until day 30 to repay the advance.
• If the advance isn’t repaid by day 30, ownership transfers to Diamond Banc, and the remaining balance of our original purchase offer will be issued to you within 5 business days.

We implement an exclusive nationwide marketing strategy that prominently features your diamond on various platforms, including Rapnet.com, the world’s largest diamond dealer platform. Throughout this process, we prioritize the strict confidentiality of our clients’ identities.

Selling your diamond is a significant decision, with the ultimate goal being to receive the highest possible return, our Sellers Agent Service is designed to accomplish this goal.

Eligibility Requirements

• Item verification protocols must be completed before seller advance funds are released.
• The Seller’s Agent program applies to items valued at $5,000 or more.

GIA Certification Service

• Eligibility: Offered to all clients with 1.00ct+ diamonds that do not sell immediately.
• Complimentary with Transaction: When you complete your transaction with Diamond Banc, GIA certification is free.
• Zero Obligation: If you choose to keep your diamond, you will simply pay the GIA fee at pickup.

GIA Certification Pricing

Carat Weight	Price
1.00 – 2.99ct	$275
3.00 – 5.99ct	$465
6.00 – 9.99ct	$990
10.00ct+	Priced per transaction

Shipping & Insurance Fee of $90 per carat.

What Sets Diamond Banc Apart from Traditional Consignment Options?

When you entrust your diamond to us, we become your dedicated sellers’ agent. Our experienced team employs a comprehensive strategy to market your diamond across various platforms, connecting with a vast pool of potential buyers. This gives your diamond unparalleled exposure, maximizing its sale value.

We understand that your primary goal is to secure a successful sale and receive prompt payment. While many consignment sellers may promise high returns and boast of lofty selling prices, the reality can often be disappointing, with many diamonds remaining unsold and consignors left without payment.

At Diamond Banc, we believe actions speak louder than words. We prioritize integrity and embrace a modern, innovative approach to marketing your diamond. By investing our time and resources, we are committed to ensuring its successful sale. By aligning our interests with yours, you can trust us to strive for the maximum return on your investment.

When searching for a potential consignee, it’s crucial to ask the right questions. Focusing solely on the cut of the profits is irrelevant if the consignee cannot deliver an agreeable selling price or, more importantly, ensure a successful sale. Unfortunately, assumptions of a successful sale are all too common, often leading to disappointment.

Choose Diamond Banc as your trusted consignor, and experience the difference our Sellers Agent Service can make. Let us transform your diamond into its maximum return. Don’t settle for empty promises—rely on a consignor with a proven track record, a commitment to transparency, and a genuine dedication to achieving successful sales.

Contact Diamond Banc today to explore the possibilities and discover the financial potential of consigning your diamonds with us.

3 Must-Haves When Consigning a Diamond

When considering where to consign your diamond, there are three essential factors you should prioritize. These must-haves ensure a successful and rewarding consignment experience:

Laser Inscription & GIA Certification:

For a natural diamond to be sellable, it must have a laser inscription and be GIA-certified. This provides authenticity and adds value to your diamond. If your diamond does not possess these attributes, a reputable consignor should quickly offer to facilitate the process for you. Without proper certification and laser inscription, proceed with caution.

Standardized Consignment Agreement:

A standardized consignment agreement is crucial to establish clear terms and protect both parties involved. This agreement should outline important details such as the insurance value of your diamond, payment terms, any applicable fees, and the protocol for retrieving your item. Reviewing and understanding this agreement is vital to ensure a smooth consignment process.

Confidence in the Consignor:

When entrusting your treasured diamond to a consignor, it is essential to have confidence in their expertise, integrity, clientele, energy, and drive to turn your item into a check in your hand. Just as you would hesitate to leave your valued possessions with just anyone, a consignor in the jewelry business should inspire trust. Ask hard questions and seek answers that provide you with the assurance you need to make the right decision.

A Partnership Centered on Shared Success

From the start, Diamond Banc works with you to establish your preferred selling price and align every step with your goals. You never pay a fee until your diamond sells—ensuring our motivation is entirely focused on maximizing your return. This performance-based model means our success depends on achieving the best outcome for you.

Expert Marketing & Complete Consignment Management

Selling your luxury timepiece or fine jewelry should be effortless and rewarding. Our experienced team manages every step—from authentication and professional photography to listing and negotiation.
We market your item across the most reputable national and industry-specific platforms, connecting directly with verified diamond buyers and jewelry collectors. Our goal isn’t just visibility—it’s real, measurable results. Every detail is handled with precision, care, and confidentiality.

Access Funds Before Your Item Sells

Need cash quickly while your item is being marketed? Diamond Banc offers interest-free advances of up to 50% of your estimated proceeds. When your item sells, you receive the balance immediately.
If your piece doesn’t sell within the initial timeframe, you have flexible options to either repay the advance or continue under updated terms—always with transparency and clear communication.

What Clients Are Saying…

Christopher

Easy transaction

Sydney Michelle

Mia was amazing to work with and the company offers great prices!

Caira Rudesill

Worked with Mia to sell an engagement ring. It only took a few minutes for the appointment and they gave me a great price. Much better than trying to sell on marketplace etc.

Andrew Stauss

Mia was very polite and pleasant to deal with.

Gregory Thames

Quick and professional, even scheduled me out of schedule, for convenience, hats off to Mia Cossey and team .

Jason Smith

Great experience, even got more than I was quoted for my chain

Christopher Foust

From from the moment I got there she was very warm inviting very knowledgeable. Made the whole process. Go smooth and I believe I got top dollar for my golden silver and diamonds. Definitely have a claim for life now and the view in the office is amazing. go check it out. ..

Courtney Liefer

As soon as we met our specialist, she was warm, inviting very down to earth made the whole process go smooth and made me feel like I was getting the best deal possible very knowledgeable and gems and golden silver as well as amazing view in office great place to go

Chad Cox

An amazing experience with Mia . She is very energetic,honest and fair ! I enjoyed the visit!

Bridget Walkenbach

They were very easy to work with. Sent them the information about what I want to sell, they quoted me a price. Easily made an appointment and was out in just a few minutes. Will definitely do work with them again.

Stacy Camden

Appointment was quick and easy. I received a check for a fair amount on the spot. Highly recommend!

Kirk Schmidt

Mia was great, very friendly and efficient, and I got a good price for my jewelry.

Anandakumar Palli

Best in St. Louis, very helpful

Mary Warren

I had an over the top experience at Diamond Banc today! Mia exceeded my expectations with the amount paid to me for my gold. I will definitely recommend Diamond Banc to my friends and family!

Ronald Warren

laney declue

My experience was great, honest quote and did not take long at all, got my money the same day!

Y Negash

Very friendly and professional. My gold was valued properly, fast, and efficient. This place will definitely be something I recommend to others. Thank you

Jon Gaut

Haida Asif

I went to Diamond Banc to sell my wedding ring, and Mia immediately offered me the best market price. I didn’t even need to visit any other jewelry buyers. She was incredibly sweet, friendly, and made the whole process easy and comfortable.

Jose Garcia

Excellent to work with! I will always work with them

Jim Boyce

Work with Mia on a ring I never wear anymore. Gave me a super deal. I would definitely check out Diamond Banc if you have a old ring that’s valuable and want the best deal in town.

Drew Mattson

Smooth and easy transaction.

Victor Southerland

I think they were fair, And everything was done right there in front of me. And Great service…

Angel Burgess

Mia was amazing! We went in to sell a few pieces of jewelry for what we expected to be a small amount of money. We walked out with a large check in hand! The process was seamless and simple. Don’t sell your gold to a pawnshop! Sell it to Diamond Banc!!

Dom 2fly

Diamond Banc responded quickly, and the process was quick and easy. I had a great experience, and I will be returning. I recommend Diamond Banc!

Colleen Kochannek

I had a wonderful experience selling some jewelry pieces with Diamond Banc. Mia was informative and fast. I was in and out with a check in under 30 minutes.

Brittany Mueller

The process was very quick and seamlessly easily and the staff are very friendly! Highly recommend.

Jorji Demaret

I don’t have a lot of experience selling higher valued personal items and when I have it’s always been private sales or just a quick pawn shop stop. However I had a nice 14k gold necklace I’ve had for a couple decades that had a broken clasp and wasn’t my style anymore so I made the decision to sell it. Did some research and found this company and I kid you not it was so simple and kept the icy corporate sales feel out it. Mia is super personable, knowledgeable, and efficient. I had an email quote and same day appointment set up within an hour of my inquiry, went to office, had my appointment which took about 15-20 min since I did the quote ahead of time and I walked out with my check. Will be going back for any future sales I plan to make involving jewelry or precious metals. They absolutely deserve the 5 star ratings they receive.

Mike Kozbil

Lyndsey was very helpful and knowledgeable about the ring I was selling. She explained in detail how they came up with their offer for the ring. The offer was fair and higher than any of the other places I went to.

Barth Legate

Schedule a meeting with Mia. She was very informative. Explained the market very well and gave me a great price for my jewelry. I was very pleased with the experience and service.

Leslie Hestwood

Mia made the entire process from booking the appointment to walking out the door easy as pie!!!! Took her card to tell all my friends & if I need to sell some more pieces! 10 outta 10 recommend

Deerock

The best in business!!!!!!

Grace Anna Schwarte

Mia was such a pleasure to work with!!!! Professional, passionate, and dedicated to her craft. Diamond Banc is lucky to have her!

Zion-Joseph Leon Guerrero

Mia was GREAT to work with! Great with customer service and very personable!! Bought my 14K gold Diamond ring for a good price!!!

Te West

Mia was so nice! She was very polite and very kind

Ginger Porter

Very good experience. Fast and professional.

Thomas Baumgartner

Meeting with Mia Cossey was an absolute pleasure. Very knowledgeable and honest with additional advice on related matters. I will definitely return.

Joy Hill

I had such a pleasant experience working with Mya! She was quick , efficient and very fair with her offer! Diamond Banc has earned a life long customer.

Nancy Sansone

I recently sold a watch. Lyndsey was very polite, knowledgeable and quick. I feel I received a fair price for my item. I recommend Diamond Banc and will return in the future.

Jessica Billingsby

My experience was very pleasant and relaxing. I left feeling completely comfortable with my decision. Thank you for your help.

Kate

Professional, trustworthy service. I would use them again without hesitation.

Matrix of color The key stay above the curse

Easy to work with Diamond Banc had many pieces went as professional as it could. With rarities, Scotsman and others found not as nice to deal with.

Shazza McKenzie

Quick and easy process with great value transaction

Sadie Humes

I had an absolutely fabulous experience here. Mia is amazing and super knowledgeable and helpful. I felt like I got an amazing deal for what I brought in and she was quick, polite, and super friendly. Definitely recommend 10/10. I will be going here for all my future jewelry sales.

Patrice Woods

I recently had the privilege of selling a diamond that I had inherited from my late brother. I was a bit skeptical, being this was my first diamond sell. Mia was extremely welcoming and made the process very easy and comfortable. I was able to share the story of my late brother and how I came in possession of such a great gift. She was warm and welcoming and offered her condolences. She made the atmosphere feel less business like and more personalized. I absolutely will continue to patronize Diamond Banc and will highly recommend for their excellent service.

Nicole Smith

Very good experience!

Gerald Mindel

Transaction was handled professionally and courteously. Correspondence was prompt and meeting efficiently conducted. Highly recommend dealing with this business

Michael DeMartino

Very professional service and super friendly people with big smiles !

Bobby Franks

I had good experience with you and enjoyed my self you have a nice office it was fun thank you

Laura Davis

They were awesome helping me with some jewelry I had to see if they were worth anything and helped me with a watch if it was fake or not. They were AWESOME!! In every thing.

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Why Choose Diamond Banc to Sell Your Luxury Diamond

When you entrust your diamond, or fine jewelry to Diamond Banc, we act as your dedicated seller’s agent. Our modern consignment model combines market expertise, digital strategy, and personal service to deliver superior results. We connect your timepiece or jewelry with a vast network of high-intent, qualified buyers nationwide—maximizing its exposure and final selling price.

We understand that your top priority is achieving a successful sale and fast payment. Unlike many consignment options that overpromise and underdeliver, Diamond Banc is driven by integrity and measurable performance. We invest our own time, resources, and marketing power to ensure your success.

Selecting the Right Consignee Makes All the Difference

Before choosing where to consign your diamond ask the right questions. The most important factor isn’t the profit split—it’s whether your consignee can actually deliver a qualified buyer and a fair price. Many sellers promise high values but fail to complete the sale, leaving clients waiting and frustrated.

At Diamond Banc, we focus on performance, transparency, and trust. Our reputation is built on successful transactions, satisfied clients, and the ability to sell diamonds and fine jewelry efficiently and profitably.

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Our Offices Nationwide

Diamond Banc operates in key cities across the U.S., making it easy to access trusted jewelry selling and loan services near you.

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