Ms Markle has spoken openly on many occasions about being the daughter of a white father and a black mother and her engagement to Prince Harry has been seen as a huge marker for progress in the Royal Family.
Blackamoor sculptures and jewellery usually depict an African or non-European male, as a servant.
Princess Michael of Kent wearing the offending brooch as she's driven in to the palace for Christmas lunch.
Meghan Markle's couture gown may be worth an eye-watering £56,000, but her frugal fans have already found a cut-price alternative.
Princess Michael is not believed to have been sat at the same table as Miss Markle, 36, but would have been introduced to her for the first time at the private family gathering where the Suits star was to be welcomed by her future husband's extended family.
Princess Michael Sorry for Racist Brooch ... I'm Going to Retire It
The brooch appears to be "blackamoor" jewelry, a kind of jewelry that originated in Venice in the 16th century.
She later exacerbated the racist perception of her during a TV interview. Mark Cuthbert _ The Royal family just needs to go right ahead and withdraw Princess Michael of Kent's invitation to #PrinceHarry and #MeghanMarkle's wedding because people feel like sis tried it!
"I traveled on African buses".
Now a rep for Princess Michael of Kent says she's "very sorry and distressed" that she wore the blackamoor brooch to the Queen's Christmas luncheon, TMZ reports. In 2004, she reportedly told a group of black customers in a West Village, NYC restaurant to "go back to the colonies" after she complained that they were being noisy.
A close-up of Princess Michael's brooch.Splash News Awam Amkpa, associate professor of Drama and Africana Studies at NYU, confirmed that Princess Michael's brooch is indeed a Blackamoor.