Welcome to GemByr - Diamark LLC - Wholesale Jeweler & Gold Buyer in Portsmouth, NH

Want to sell used jewelry? Want to sell estate jewelry? Gembyr is your one-stop trusted source for selling your diamonds, used jewelry and precious metals. With over 3 decades of experience in the diamond and jewelry trade, we have committed ourselves to providing our valued customers with fair and honest prices for all your jewelry, estate pieces, precious metals like gold and platinum and loose diamonds. We are the region’s most sought-out buyer for diamonds and jewelry because we make every transaction a safe, secure and profitable one for our clients.

Gembyr is a second-generation gemologist-jeweler, experienced in handling estate liquidations both large and small. If you have diamonds and precious metal jewelry that you’d like to sell, give us a call today. Gembyr is your best option for selling your valuable jewelry and gemstone items. If you are unable to bring your items in person, simply contact us for directions on how to safely ship your pieces and receive a prompt payment. Call us or email today and learn more.


We acquire a broad range of jewelry and gemstone items from various sources—and we are recognized for paying the best prices to our valued clients. Whether you have 1 or 100 pieces, we will be happy to accommodate your needs quickly and profitably for you. We buy a wide variety of gold and platinum items, including signed jewelry pieces, plus estate and contemporary jewelry. We accept both good condition items and worn out or broken jewelry.
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How it Works

Many of our customers are from the New England region near but not limited to the New Hampshire area. We also buy from private sources around the country. So, you can contact us by phone or email to let us know what you would like to sell. There are several secure methods of receiving payment for your property; and we will be happy to discuss the best one for you. We have two locations in Portsmouth, NH and Hampton Falls, NH by appointment only. Contact us today and learn how we can help you sell your unwanted gold and diamonds; all transactions done with your complete privacy in mind.
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