• Diamonds
October 28, 2013
Posted by felix

Long Island GIA Certified Diamond Buyers

Do you have diamonds that you are interested in selling? Then you have found the right place. Collectors Coins & Jewelry is the only diamond buyer & seller in Long Island that is always looking to purchase new inventory. We deal with a huge market of buyers & sellers to ensure that you get only the best prices for your diamonds.


As one of Long Island’s most prominent dealers, we can afford to pay top dollar for diamonds and diamond-encrusted jewelry. We offer great services with expert GIA evaluations done right on the spot; your jewelry never leaves sight!

We will make sure to accommodate your every need, whether you are looking to sell loose diamonds, diamond jewelry, or a single diamond engagement ring.

Each of our four locations is staffed with a trained Gemologist who will take you through our analysis process to properly identify the true market value of your diamonds and diamond jewelry. Our business relies heavily on educating the customer and we strive to give you the confidence you deserve in knowing that you received the best offer for your diamonds.


    1846 Grand Avenue
    Baldwin, NY 11510

    Mon - Sat: 10:00am - 6:00pm
    Sunday: By Appointment Only

    Phone: 516-223-1212

    331 New York Ave.,
    Huntington, NY 11743

    Mon - Sat: 10:00am - 6:00pm
    Sunday: By Appointment Only

    Phone: 631-421-4774

    393 Sunrise Hwy Suite C.
    Lynbrook, NY 11563

    Mon - Sat: 9:30am - 6pm
    Sunday: By Appointment Only

    Phone: 516-341-7355

    400 Sunrise Highway
    Massapequa Park, NY 11762

    Mon - Sat: 10:00am - 7:00pm
    Sunday: By Appointment Only

    Phone: 516-541-4040