About Jonathan’s Diamond Buyer

Jonathan's Diamond BuyerJonathan’s Diamond Buyer began when Sergio Nuncio and Jonathan Siegel joined forces at Jonathan’s Fine Jewelers. Both had been buying and selling diamonds, estate jewelry and watches and when they met through a mutual business associate to broker a diamond deal and a partnership was born.  As the business has grown and flourished, Jonathan has focused on diamond sales at Jonathan’s Fine Jewelers and Sergio has taken the helm of Jonathan’s Diamond Buyer.

Sergio Nuncio has been buying and selling used jewelry since he was 17 years old. After high school, he took a job at a pawn shop, where he worked the counter and started to develop an interest in watches of all kinds. Although he didn’t know much about watches at the time, he had a knack for buying the best merchandise from the customers before they could hit the displays.  One day, Sergio was working the counter, when a customer came into the store and offered to buy the watch off his wrist. Sergio was shocked and was not about to sell his watch to this man, but his girlfriend wanted to go and see a concert and Sergio needed the money to buy the tickets, so the next day he contacted the buyer and asked if he was still interested and sold him the watch.

A few weeks later, the same man came back to the pawn shop and saw that Sergio had the same watch on his wrist and asked him how that was possible, so Sergio pulled out a gym bag full of watches he had been collecting. This man gave Sergio a book on vintage watches that changed his life and made him realize his hobby was actually worth money.  Sergio learned everything he could about watches…or so he thought. The second lesson he learned was with a ladies Rolex that he took to a jewelry show. A very reputable jeweler came over and asked him if it was for sale, and Sergio said it was. The man made him an offer and Sergio grabbed it because at the time, he had never seen so much money in his young life.  After the sale was made, the man took Sergio aside and told him he wanted to teach him a lesson and explained that this Rolex was platinum and very rare, while Sergio thought it was just stainless.

sergio nuncio, diamond buyerThis was a defining moment for Sergio, and he realized that bag full of watches wasn’t just a bag full of money, but a bag full of jewelry, and he began to actually study and learn the history of each piece, not just what the price should be. Sergio eventually moved into buying and selling small diamonds and estate jewelry, which is how he met Jonathan.  After Sergio and Jonathan completed their first diamond sale Sergio knew that Jonathan was a stand-up guy, so when Jonathan invited Sergio over for drinks to his  home, Sergio had a feeling that big things were going to be happening.

At the age of 19, Sergio found himself in Jonathan’s home, which was wall to wall white carpet and marble with a hole in his sock.  But, that didn’t stop Jonathan from seeing his potential or Sergio from accepting the offer of a partnership.  Sergio Nuncio is self-taught and tough. At the age of 44, he has been around the block, seen many things and done more, but you won’t find anyone who will be more fair with you, more loyal to you or more straight forward with you.  He doesn’t believe in the hard sell, but he does believe in being direct. He is honest to a fault and he will tell  you exactly what your diamond, watch or jewelry is worth.

His testimonials speak for themselves, and as Tammy in New York says:

Sergio was a pleasure to deal with. I sold him my 2 carat diamond engagement ring. Not only did he offer a very fair price, but he was very helpful and thoughtful during the whole process. It was MUCH easier than I ever thought it would be. The payment was made immediately, and I am so grateful for all of his help. I RECOMMEND HIM VERY HIGHLY!!!!

If you have a diamond, watch or piece of jewelry that you need or want to sell, you can contact Sergio by phone (832)277-5725, via email at sergio@jonathansdiamondbuyer.com or through our contact form and he will be happy to help you through the process in the easiest way possible.

Sergio is also in charge of all the online sales for Jonathan’s Fine Jewelers. If you don’t live in the Houston area and can’t make it by our showroom to see our estate and one-of-a-kind custom jewelry, then you can shop from the comfort of you home for watches, such as Rolex and Cartier, estate and diamond jewelry and high-end jewelry such as Tiffany & Company, Cartier and David Yurman.