Welcome to GemByr - Diamark LLC

Gembyr is your one-stop trusted source for selling your diamonds and precious metals. With over 30 years 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. 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.

At Gembyr, you will sit down with an experienced second-generation gemologist-jeweler, who will look at your jewelry item(s) both large and small. The age of the jewelry, condition, desirability, all go into the evaluation on the secondary market. If you have diamonds, estate jewelry and/or precious metal jewelry that you would like to sell, give us a call today to schedule an appointment.

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 .

Our typical work hours: Monday-Friday 9:00am-4:30pm


What We Buy
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

What We Buy
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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