J. Birnbach started as a diamond cutting company, and today, we are known as one of New York’s premier diamond houses, specializing in the finest diamonds and jewelry.

With our extensive inventory of over 2,000 GIA certified diamonds ranging in weight from 1 to 30 carats, J.Birnbach has the cut, color and quality you are looking for.

We also specialize in high-end diamond jewelry that has been worn on red carpets around the world from the Emmys to the Oscars. Our stunning assortment of earrings, rings, bracelets and necklaces incorporates both classic and modern designs to create truly remarkable one-of-a-kind diamond pieces.

Our Philosophy

At J. Birnbach, we believe honesty and integrity are our two most valuable traits we can offer to the diamond community. Our inventory is honest, having had every stone screened for flaws and making sure the stones are exactly as advertised. We also stand behind our retailers and our product at every turn. We believe in being upfront about everything and therefore, we are an honest, reputable company that is proud to be a part of this industry.


We work hard to meet and exceed all of our customers’ expectations by providing the attention to detail that they deserve.

J. Birnbach offers exceptional quality diamonds and fine jewelry and is known for on-time delivery and excellent after-sales support. With our commitment to go above and beyond, you can count on us for all of your diamond and jewelry needs.