Royal Asscher Diamond Company, Dutch diamond-cutting company founded in 1854 by Joseph Isaac Asscher
The gem required expert handling to be properly carved: inclusions within the rough diamond prevented it from being polished as a single stone.
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The company keeps a ‘Golden Book’ of visitors, who have included Emperor Hirohito of Japan, Queen Elizabeth II of the United Kingdom, and Queen Juliana and Prince Bernhard of the Netherlands.
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