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  • Welcome to Rosenberg Cooper

    Rosenberg Cooper’s professional global network of individuals and companies has over 20 decades’ combined worth of experience within the precious stone and jewellery industry.
  • Welcome to Rosenberg Cooper

    Rosenberg Coopern’s professional global network of individuals and companies has over 20 decades’ combined worth of experience within the precious stone and jewellery industry.
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Certification

A diamond certificate is issued following an unbiased and professional examination to authenticate a diamond's
attributes.

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The Market

November 2010, a 24.78-carat pink diamond sold at a Sotheby’s auction in Geneva to diamond dealer Laurence Graff for a record $46.1 million...

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Coloured Diamonds

Patti Wong, chairman of Sotheby’s Asia, wears a 80.69-carat yellow diamond ring in Hong Kong valued at $3.5 million in November...

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In Detail

A diamond is judged by four distinct factors that combine in a number of ways to arrive at its value. These are called the 4 C's - Colour, Carat, Cut, and Clarity..

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Diamonds have a unique and enduring value and, as they become rarer and demand continues to outpace supply, they have become a more attractive store of value.

Stephen Lussier - An executive director of De Beers and the chief executive of Forevermark.

Diamonds may well be a girl's best friend. But they could also put the sparkle back into investors' eyes, now that commodities, other than gold are trading below the highs of the past twelve months.

Mindfullmoney - August 2011