Princess Michael of Kent, who married Queen Elizabeth II's first cousin, attended a Christmas banquet at Buckingham Palace on Wednesday wearing the blackamoor brooch, reports the BBC.
Blackamoor figures and sculptures are exotic figures which usually depict African men and were prominent in the 17th and 18th centuries.
A spokesman said the princess "is very sorry and distressed that it has caused offence".
"The brooch was a gift and has been worn many times before."
Prince Harry's fiance, Meghan Markle, who is mixed-race, was also a guest at the lunch.
The brooch, coupled with the fact that Princess Michael will have met Markle at the lunch, has sparked controversy on social media websites.
It is understood the princess will not wear the brooch in future.
(This story has not been edited by Social News XYZ staff and is auto-generated from a syndicated feed.)
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