About Onyx

Established since 1987, Onyx is one of the world's leading manufacturers and suppliers of square shaped diamonds.

Through its worldwide network and affiliates, Onyx has a strong inventory of Square, Emeralds, Baguette, Princess, Emerald, Carré, Round and Taper diamonds, in fine assortments.

This inventory and in-house manufacturing facilities enable Onyx to provide custom solutions to meet it's clients needs.