Aventura's Premier
Jewelry Buyer & Lender
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THE FORUM – AVENTURA
19790 W Dixie Hwy
Suite 1135, 11th Floor
Miami, FL 33180
Visit our Aventura - Miami, FL Location
Diamond Banc Holdings, LLC
THE FORUM – AVENTURA
19790 W Dixie Hwy
Suite 1135, 11th Floor
Miami, FL 33180
Monday: 11AM – 7PM
Tuesday: 10AM – 6PM
Wednesday: 11AM – 7PM
Thursday: 10AM – 6PM
Friday: 10AM – 6PM
Saturday: By Appointment Only

Xammany Vongratsamy
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.
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Diamond Banc also has locations in Tampa, Boca Raton, Miami, Orlando, Nashville, Atlanta, Charlotte, Kansas City, Columbia, & 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 QuoteIn-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.
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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.