At Diamond Jewelers, we offer a wide selection of jewelry featuring diamonds, gemstones, platinum, gold, silver in the form of rings, necklaces, bracelets and more!  We have custom crafted jewelry sure to satisfy the taste of the most exacting buyer.  With thousands of pieces to choose from, we have no doubt you will find the perfect gift for a loved one or for yourself.

Jewelry Repair

We are proud to be the jeweler of choice in your neighborhood and be trusted with your jewelry repairs.  We know how precious your jewelry can be to you since it could be an engagement ring, family heirloom or have some substantial memories attached to it.  We take special care to make sure each repair brings your piece of jewelry back to life and you can use it for many years to come.  We have expert jewelers on staff at both locations in Centereach and Port Jefferson ready and willing to help you with your repairs.

Jewelry Appraisals

We have GIA trained Gemologists on our staff.   Whether you need an appraisal for your insurance company, for an estate valuation or other purpose we are the professionals that can guide you through the process.   Our Written Appraisals accepted by all insurance companies.  

Custom Designs

Do you like what you see but the design or color doesn't suit your needs?  We can help!  Please spend a few minutes speaking with one of our experts about your needs and we will get to started working together on your masterpiece.  From concept to completion we will be by your side!

Estate Jewelry

We are always on the lookout for beautiful, gently used pieces of jewelry for the those with a unique taste in the eclectic and vintage.  Browse our wide array of ever-changing stock to find the perfect piece of jewelry that speaks to you!


We carry watches from brands like Citizen, Bulova, Movado, Invicta and more!  Come browse our ever changing selection of watches you can wear on special occasions or every day.

Contact Us Today!