Aventura, Miami, FL | Location We Serve - Diamond Banc
Luxury jewelry

Aventura's Premier
Jewelry Buyer & Lender

Aventura's Premier
Jewelry Buyer & Lender

Visit our Aventura - Miami, FL Location at

19790 W Dixie Hwy
Suite 1135, 11th Floor
Miami, FL 33180

Visit our Aventura - Miami, FL Location

Diamond Banc Holdings, LLC


19790 W Dixie Hwy
Suite 1135, 11th Floor
Miami, FL 33180




Monday – Friday: 10AM – 6PM
Saturday: By Appointment Only


Book Appointment

Market director's portrait

Xammany Vongratsamy

Aventura, FL

With a career spanning more than 30 years, Xammany Vongratsamy is one of the most experienced luxury jewelry experts in the Florida area. She has worked for many of the world’s most prestigious brands, including Tiffany & Co., Patek Philippe, Cartier, Chopard, Chanel, Breguet, Harry Winston, Jaeger LeCoultre, and Girard Perregaux.

Xammany is known for her no-nonsense approach to evaluating your jewelry items—she knows exactly what she’s looking for and how to get you the highest possible offer. If you’re looking to sell your jewelry or secure an asset-based loan, Xammany has the expertise and experience to help you make the right decision.

What Clients Are Saying…

Анастасия Чайковская ★★★★★ Quality customer service and help with all detailsElias Rodriguez ★★★★★ World-class service with customer success in mind.Iryna Rodionova ★★★★★ Very pleased with service and great vibes.Xammani explained everything to me in details, answered all my questions.She is professional, knowledgeable and trustworthy.Also she is very friendly and supportive.Definitely recommend!Arika Smith ★★★★★ Xammany is amazing!iAldo Gomez ★★★★★ Very professional and quick service. Xammany was a pleasure to deal with. Strongly recommend it to anyone.Karen McCollum ★★★★★ She was really helpfulShe so nice and professionalOrlando Carrasco ★★★★★ Amazing customer service. Fast payment. Will definitely worth with Xammany again.Gregory Smith ★★★★★ Bradley Naugle ★★★★★ Xammany is extremely professional and the best at what she does, she was able to provide me a great loan at a great rate, looking forward to working with her again.mac jamie ★★★★★ DIAMOND BANCI just left there.. they have the best prices in town .. I mean no one in the US has better deals even the loans are incredible..Thank you XAMMANY VONGRATSAMY😙😙😙Wayne Wilson ★★★★★ Xammany is very knowledgeable, professional, and kind. If I ever need to buy sell or loan I will definitely be going back to her when I am in the areaWayne Winkler ★★★★★ Xammany is a very truly amazing knowledgeable person very caring as wellMariela Mercado ★★★★★ This is an Amazing Business, Xammany with Diamond Banc Aventura is a pro in her field to the moment we talked on the phone the guidance reassurance and the way she treats you more than a friend by how she walks you to the office im very greatful for her and will only manage Business exclusively with Xammany in Diamond Banc excellent service above my expectations fast accurate and more than anyone in the jewelry field no competition THEY ARE THE BEST.John Buck ★★★★★ Xammany was amazing, very knowledgeable in the industry and was great to work with her. I highly recommend diamond banc for anyone looking to sell or get a loan.Mydygma Nimbueva ★★★★★ I met Xammany “ some money “ through my clients from Beverly Hills who keep raving abt her I’m sooo grateful our paths cross. I’ve got Rolex of my dream with your help! You make me the happiest woman in this universe!!! Thank you!!!Wendellionaire RICH ★★★★★ The service was amazing fast and fair estimate, has me in and out in a matter of minutes. Look forward to working with them againPaula Henao ★★★★★ Xammany at Diamond Banc in Aventura was extremely professional and very knowledgable. Thank you for such a wonderful experience and I will recommend to anyone who wants to sell their jewelry . The process was fast , she explained everything to me step by step. Thank you Xammanyroses Brustowsky ★★★★★ Xammany is such a sweet & pleasant person to work with! I came in not knowing anything about the process and she patiently explained every step.A wonderful experience! Definitely recommend!Thnk you so much!Christopher OHara ★★★★★ There the real deal and the best highest paying on the planetgodpower art ★★★★★ Xammany was so excellent the first time I spoke to her over the phone and she gave me excellent rate on my loanmega poster ★★★★★ Fast, discreet and very professional! Highly recommend! A++Bella Yiki ★★★★★ Amazing customer service very happy with the price she give me for my jewelry. Thank uLeah Mathew ★★★★★ 10/10 recommend, this is a great place with an ever better staff!!! Go here!!Samantha Nevis ★★★★★ Bob Bob ★★★★★ Amazing company! Very fair and honest. You can even ship your item to them.Chris Pak ★★★★★ Excellent transaction, professional, very transparent and huge shout out to Xammany.She is an amazing person.ThankYou for having us!mariah romo ★★★★★ Xammany Was the best to work with. She was easy, understanding & super helpful with what I needed. Diamond banc was super easy & I wish more people knew about it.Lauren Hille ★★★★★ Honest, good friendly people.Karlla Daniela ★★★★★ Sandra Cardenas ★★★★★ I had the privilege of meeting Xammany who is very professional and an amazing woman. She took the time to verify each piece of jewelry and gave me the best offer!I will definitely use her again!Tatiana Pechkina ★★★★★ This is the best place to buy, sell or pawn your jewelry!Ive drove around few places and Xammani, lady that works there gave me best price for what I’ve had, she was very knowledgeable, very professional and very friendly, made my experience 10 out of 10! Will only come back here.Humberto Uzcategui ★★★★★ Pedro Zaragoza ★★★★★ Nena Knafo ★★★★★ Best service. Educational and professionaljoaquin coll ★★★★★ Amazing place, amazing customer Service. Highly recommendAsk for XammanyTorin zielenski ★★★★★ Beautiful storefront, just be aware you need to park on 7 and take the elevator to the bottom floor then sign in and take the elevator to 11. Xamoney met me at the entrance and showed me to her office. All was a very pleasant experience and and our business was concluded efficiently and professionally with a personal flare that made me feel really comfortable.Emmanuel Jean-Francois ★★★★★ Very very good place to go. Xammany is an extraordinary person, who is very professional , kind and honest. I have Many friends talking about her in very good terms .Congrats Xammany.Michael Perez ★★★★★ Process was very simple and not stressful at all. Office is new and clean and staff is extremely friendly. Xammany was extremely accommodating and offered prompt and insightful information. I highly recommend her as she goes above and beyond for all her clients .Lizz Rodriguez ★★★★★ So knowledgeable easy to work with quick access paid great moneyAkiva Goldman ★★★★★ Diamond Banc is outstanding in the jewelry buying world. Experts, beautiful offices and smooth processes. Thank you Xammany!!!!Swtxcuddles ★★★★★ Excellent customer service. I highly recommend!!Ariel Davis ★★★★★ Xammany was absolutely amazing and quick and efficient. Super sweet and knowledgeable. I won’t go anywhere else after my experience.Giancarlo Pasqualotto Pesquera ★★★★★ Excelent and very nice person !!!LONEJAY ★★★★★ Pro.Alex Achille ★★★★★ Excellent service very kind and helpful and the process wasn’t long at all highly recommendedShawana Allen ★★★★★ This is my first time getting a loan on my jewelry. She was very nice and pleasant. She was patient with me and very professional! If ever in need to sell or get a loan please visit Diamond Banc! I would definitely recommend anyone to their services.Gaston Miy Uranga ★★★★★ If you want to sell your jewelry come here for sure !Mari C ★★★★★ Xammany is awesome!! I had a number in mind & she gave it to me!! Im so glad I came here. Really nice & proffesional! Thank you!Mrs FriedChicken ★★★★★ Xammamy was pleasant and did a wonderful job explaining how resale value works. Highly recommended.Tot Mosely ★★★★★ Very helpful and nice ladyVanessa Serrano ★★★★★ Xammany was really kind. Thank you so much.CESAR DAVID RINCON GODOY ★★★★★ I really recommend the service that Xammany provides, very friendly, transparent and with a human and professional sense. 7-star care and serviceerika fermin ★★★★★ So glad I came across Xammany. Aside from being a lovely personal she’s so knowledgeable and honest. I highly recommend her for any of your jewelry needs.Oscar Osorio ★★★★★ I had a great experience with Xammany! She is very kind and attentive. I’m looking forward to liquify my luxuries with Diamond Banc.Marina Hoffmann ★★★★★ Excellent customer service. Director Xammany quoted my ring. Trust her completely. Very professional. Thank you Xammany!!!!Diana Tan-Jun ★★★★★ Xammany was awesome , knowledgeable and very nice. She gave me an amazing price and an incredible chat 😊Sandra Paternina ★★★★★ Awesome service!!!! Xammany was amazing 😃Nadija Glusz ★★★★★ Excellent top-notch service. Very fast process to sell your old ring. I would recommend. Thank you.Juan Pablo Guillen ★★★★★ Great customer service, highly recommended to everyone. Xammany is an expert and very knowledgeable about the business.Steven Vaccaro ★★★★★ Dror Ashkenazi ★★★★★ Xammany is the best!Kevin Bryant ★★★★★ I have bought and sold to Diamond Banc they have am amazing staff great pay, I truly enjoyed working with Amy & Deena.Nattie Verna ★★★★★ I had an awesome experience at Diamond Banc. Xammany was very professional, honest and knowledgeable. She was my angel today .Thank youEva Salazar ★★★★★ Xammany is a super nice person, very knowledgeable with a lot of years in the industry. She takes the time to explain everything in detail and answer all the questions and concerns. The place is intimate and secure!! 100% recommendableGuayo “Clockbridge” Callejas ★★★★★ Amazing, professional and informative every step of the way. Reliable and made me feel confident in the process, would highly recommend.Barbara Brown ★★★★★ Very good thank you very muchFlo Bartenders ★★★★★ THE BEST IN THE GAME!Excellent service, Very informative, and beyond professional. Will always go back to sell my jewelry to them. I got the best price from them.Omara Barrios ★★★★★ inae kortz ★★★★★ Fantastic experience! Thank you Xammany Vongratsamy for your care and assistance !Yolanda Hernandez ★★★★★ Jori Kosek ★★★★★ Xammany is so friendly and professional and always pleasant to work with! Thank you for everything Xammany!Kenny Ladler ★★★★★ All My Brothers Moving and Storage ★★★★★ Great place! The customer service and work ethic was impeccable. Thank you so much.Extremly Blessed ★★★★★ The representative was very hospitable very nice and attentive I highly recommend this place for your businessPauline Green ★★★★★ Chykeria Ferguson ★★★★★ Great customer service and professional.Michael Mariano ★★★★★ Ahn Chantharasinh ★★★★★ Phuguens Accus ★★★★★ Xammany is amazing 😻. Great place and love the service!Kikko perez ★★★★★ Xammy is the best in the business, hands down! I highly recommended to handle all of your questions and to ensure you the best experience ever!Adriana Vargas Hernandez ★★★★★ I absolutely love Xammany. She has incredible insight, knowledge and experience. She has so much to offer in the ultra luxury market.Regine Dupuy ★★★★★ Very insightful and helpful😊Tony V ★★★★★ The Finest 👌🏽Don Bopp ★★★★★ The process was very easy and straightforward. Xammany is a true professional and explained everything in a concise manner. I am very pleased with my Diamond Banc experience.Fam bam Love ★★★★★ Simon Terechin ★★★★★ Excellent Service Xammany was very pleasant and professionalTo work with.Tracifina ★★★★★ Konstantin Plaksin ★★★★★ The best place for the morning coffeeCamilo Mahecha ★★★★★ Definitely would use them again!! Excellent serviceYesenia Mahecha ★★★★★ Excellent serviceRoxana Karina Morelli ★★★★★ Thank you so much much for your patience and professionalism with my loan.Cristian Pinzon Orbegozo ★★★★★ Xammany was very professional and helpful with my request. I recommend her for anyone who needs to get emergency loan with the best rate in town.Koshah Woods ★★★★★ Diamond Banc was very knowledgeable about the quality of jewelry and helped me price my ring appropriately. Xammany helped me tremendously and I would recommend them to anyone looking to buy or sell quality jewelry.Mack Pholsina ★★★★★ Kasadphun Kanokporn ★★★★★ Wonderful experienced ..best service ..Will be back again..Thank youDee Gomez ★★★★★ John Vongratsamy ★★★★★ Thi N ★★★★★ Xammany went above and beyond meeting my expectations! She vibe is what attracted me to products!Danny Vongratsamy ★★★★★ js_loader
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Not located in the Miami, Aventura area?

Diamond Banc also has locations in Tampa, Boca RatonMiamiOrlandoNashville, AtlantaCharlotteKansas CityColumbia, & Rochester.


Get a Quote

In Person or Online

Schedule a private evaluation at your local Diamond Banc or use our online submission form.

Start a Quote

In-Person Evaluation

Complete In Person

Meet privately with a Diamond Banc director who’ll evaluate your items right in front of you & make you an offer.


Get Funded

Fast & Secure

If you accept our offer, we will issue payment immediately via check or wire transfer.

5 stars
Amazing experience. Xammany gave me an appointment on a Saturday which is a day that they are not open, and was very professional and helpful with me getting a loan. I definitely recommend this place to anybody that is trying to sell or take out a loan. Thank you so much, Xammany!
5 stars
Diamond Banc of Aventura is THE go-to destination to sell or borrow against your fine jewelry and luxury watches! The manager is an expert buyer, super knowledgeable, and professional. You’ll definitely get the deal here!

Visit Our Location

Located on the 11th Floor of the Forum Aventura building, just across the renowned Aventura Mall, Diamond Banc of Aventura provides a discreet and secure environment for clients looking to meet with our jewelry and watch experts. Upon arrival, check in with the receptionist at the front desk, who will then direct you up to our suite.

Diamond Banc in Aventura offers a range of services for clients looking to sell their luxury assets, including gold, diamonds, and luxury watches. As the top jewelry buyer and equity lender in Aventura and the surrounding areas, Diamond Banc takes pride in offering clients a simple, transparent, and hassle-free selling experience.

Why Choose Diamond Banc of Aventura, FL?

Diamond Banc operates nationwide to provide consumers with an unrivaled menu of options to access the liquidity their fine jewelry and watches possess, via immediate sale, Jewelry Equity Loan, or consignment sale. Our firm operates in a branded, modern fashion. Diamond Banc’s office in Aventura was opened to service a discriminating and affluent clientele in a prompt and confidential manner. Our Aventura location is positioned to routinely work with clients from Bal Harbour, Coconut Grove, Aventura, North Miami, and North Miami Beach.

We provide consultations to clients who are considering selling, consigning or borrowing against their important jewelry.  We are the premier diamond buyers, Rolex buyers, and jewelry buyers in Aventura, Bal Harbour, and Coconut Grove. Our market directors are experts located in the South Florida market, offering unparalleled expertise and market analysis when it comes to selling or getting a loan secured by your fine jewelry items. Our jewelry-secured loans are night and day different from when a person pawns jewelry.

Diamond Banc of Aventura is an extension of our luxury Diamond Banc brand, which has locations in premier cities across the nation. This ensures you receive the highest possible value assessment for your items in a confidential and polished environment. Our expert jewelry & Rolex buyers in Aventura will provide you with an accurate evaluation and financial solution that is tailored to your specific needs and desires. We offer discretion when selling their jewelry—we offer private appointments at our offices in Coral Gables & Aventura to ensure confidentiality during each sale, consignment, or loan transaction. Our directors provide every client with individualized attention, and industry-leading offers.

The Best Gold Buyer in Aventura

For clients looking to sell their gold, Diamond Banc purchases a variety of gold items, including unworn pieces, broken jewelry, scrap gold, dental gold, and more. With a longstanding partnership with some of the largest refiners in the country, Diamond Banc can offer the highest payouts for unwanted gold items. Clients can receive immediate, hassle-free funding upon accepting an offer.

Aventura’s #1 Diamond Buyer

Diamond Banc also specializes in buying diamond jewelry, including loose diamonds, diamond engagement rings, and other high-value diamond jewelry items. The team of diamond-buying experts assesses the value-adding elements of each diamond and provides an accurate market value, regardless of whether the diamond is certified or not. Diamond Banc offers a range of liquidity options, including an immediate cash purchase, consignment services, and VIP Seller’s Agent Service for high-value items.

Rolex & Luxury Watch Buyer in Aventura

As a top Rolex watch buyer in Aventura and Miami, Diamond Banc provides clients with top value and exceptional service for their luxury timepieces. The team is highly skilled in evaluating all factors that contribute to the value of each timepiece, including model, age, condition, and rarity. With a network of Diamond Banc locations across the country, the team stays up-to-date on the latest market trends for Rolex watches and offers the highest value possible for all models.

Clients looking to sell other luxury timepieces from top brands such as Patek Philippe, Audemars Piguet, and more can also turn to Diamond Banc. With extensive expertise in the luxury watch market, Diamond Banc provides clients with top value and exceptional service for their timepieces.

Loans Secured By Your Jewelry

Collateralized loans are a popular option for those seeking immediate funding while retaining ownership of their valuable jewelry. At Diamond Banc of Aventura, we specialize in providing collateralized loans secured by diamonds, gold, luxury watches, and other high-value fine jewelry items. Our lending process is simple, secure, and confidential, with pro-consumer loan terms that can be tailored to your preferences and situation. 

We are the nation’s leader in providing collateralized loans, offering loans secured by one item or entire collections. Our loan values are the highest in the industry, and our borrowing costs are the lowest in all of Miami. Our team of experts is dedicated to providing personalized service and helping clients magnify the fiscal power of their jewelry.

Our clients have the option to redeem their collateral under favorable repayment terms, and generally receive the same amount of proceeds as they would by selling outright. We routinely loan clients up to $350k+ and our loan terms can be adjusted to suit your specific needs. Receive the same amount of proceeds as if you sold your item, but maintain ownership with our jewelry Equity Loans in Aventura, Bal Harbour, and Coconut Grove.

Diamond Banc of Miami, Aventura Branch

Diamond Banc, serving Aventura, provides top-quality consultation for clients who wish to sell jewelry in Miami. Our market directors are experts in the South Florida market, offering unparalleled expertise and market analysis when it comes to selling or getting a loan secured by your fine jewelry items. This ensures you receive the highest possible value assessment for your items. Our expert buyers in Aventura will provide you with an accurate evaluation and financial solution that is tailored to your specific needs and desires.

We are trusted by people who want discretion when selling their jewelry—we offer private appointments at our offices in Coral Gables & Aventura to ensure confidentiality during each sale. Our staff is trained to provide every client with individualized attention so we can obtain the most accurate evaluation of your item’s value and help you understand how this reflects its market value and resale potential. As a result, we can provide you with an array of liquidity options based on the funding you are seeking to secure from your precious metals, diamonds, and luxury watches while also providing you with peace of mind that each transaction is simple and secure.

Diamond Banc of Aventura proudly serves clients West Island Blvd, Biscayne Blvd, Turnberry Way,  City Center,  East Island Blvd, Golden Beach, Point East Drive, Country Club Estates, Yacht Club, Aventura Central Island, Aventura Mall, North Island, Prive Island, South Island, Waterway Village, Marina Palms Yacht Club, Aventura Estates,  Echo Condos, Mystic Point, The Peninsula Aventura, & William’s Island.

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