Grunberger Diamonds is a fourth generation family owned Belgian Diamond Manufacturing company that specializes in Ideal Cut with Hearts and Arrows in melee. Grunberger Diamonds has offices world-wide in Antwerp, New York and Japan. Our sizes range from 0.70 mm to 4.29 mm. In addition, we carry over 50 combinations of colors and clarities ranging from VVS-I1 clarity and D-L color all within the Ideal Cut proportions. 

The Grunberger Precision Cut® is the original producer of small Ideals with Hearts and Arrows. The perfect homogeneity and reliability of our Cut will maximize the brilliance within all jewelry pieces. 

Grunberger Diamonds is a proud member of the following Diamond Associations:
American Gem Society (AGS)
Diamond Manufacturers and Importers of America (DMIA)
Gemological Institute of America (GIA)
Jewelers Board of Trade (JBT)
Manufacturing Jewelers and Suppliers of America (MJSA)
Responsible Jewellery Council (RJC)


Grunberger Diamonds, Inc.

Grunberger Diamonds, Inc.'s headquarters in Great Neck, NY, United States

Grunberger Diamonds, Inc.

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Grunberger Diamonds, Inc.

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