Joseph Blank Inc

We established Joseph Blank in 1919 as an industry powerhouse in loose diamonds. The company, now into its third generation of Blanks, still specializes in all sizes and shapes of high quality loose diamonds.

The Blank family services a customer base that includes retailers, manufacturers and wholesalers. Joseph Blank is well known for its unmatched service and competitive prices. We are considered one of the best “small goods” houses, stocking over 15 different qualities of melee which range from white, white naats, top light browns, and top silvers. Our specialty is calibrating sizes and diamond bagging. So, please feel free toinquire about our full service-bagging department.

Additionally, Joseph Blank has an extensive large stone inventory ranging from 20 pts. through 3 carats. Most of our better quality diamonds are certified from highly recognized gem labs (i.e., GIA, AGS, EGL, and IGI).

We have built our fine reputation by giving jewelers what they want when they want it! We guarantee that we will ship your order within 24 hours of your phone call. Please, call us any time, any day, and speak personally to Jeffrey Crohn, Marjorie Blank, or Douglas Blank.


Children, Womens, Mens


Casting & Polishing



62 West 47t Street Suite 808

New York, NY US

Main 212.575.9050

Fax 212.302.8521