Rosenberg Diamonds & Co.

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our stones

Rosenberg Diamonds & Co. is a vertically integrated house of excellence, where every diamond’s journey is as exceptional as the stone itself. Each rough or polished diamond is responsibly and ethically sourced, ensuring it is entirely conflict-free. Many of Rosenberg’s special stones begin from carefully selecting the finest rough from the various mines and producers, moving through every stage of the transformation from meticulous planning, precise laser cutting to the final polishing perfection.

Rosenberg Diamonds & Co. is a vertically integrated house of excellence, where every diamond’s journey is as exceptional as the stone itself. Each rough or polished diamond is responsibly and ethically sourced, ensuring it is entirely conflict-free. Many of Rosenberg’s special stones begin from carefully selecting the finest rough from the various mines and producers, moving through every stage of the transformation from meticulous planning, precise laser cutting to the final polishing perfection.

For more than two and a half decades, Rosenberg has cultivated strategic alliances with select mines and master cutting facilities across South Africa, Botswana, Angola, Antwerp, Ramat Gan, Hong Kong, and New York. These relationships ensure a continuous flow of extraordinary stones, entrusted only to elite master cutters whose artistry reflects Rosenberg’s signature precision.

We work exclusively with natural, untreated diamonds of exceptional rarity spanning to over 100 carats of the highest color and clarity grades in white diamonds to the world’s most coveted fancy-colored diamonds and precious gemstones. Each is selected with the discerning eye of a collector and the discipline of a seasoned diamantaire.

Through the heart of a rough diamond, I see what an artist sees in his canvas endless beauty waiting to emerge.—Rosenberg

Every diamond is accompanied by a GIA (Gemological Institute of America) certification, affirming both its grading and its ethical origin. A Rosenberg diamond is more than a jewel it is A Legacy In Every Carat®.

At Rosenberg Diamonds & Co., we pursue significance. Every diamond must meet uncompromising gemological standards and pass a more profound, intangible test: it must be unforgettable. Our philosophy rooted in precision, provenance, and permanence guides each step, from the sourcing to the final polish cut.