For Mateo, the world-famous and self-taught designer whose collection earned selection by the Smithsonian Museum for featuring and selling at the African American Museum of Art and Culture, participating in the #BlackisBrilliant campaign is all about helping Africans who need it most. “I normally ignore everything, but when [De Beers] kept writing, I said ‘let me respond’ because De Beers is synonymous with diamonds,” Mateo told NNPA Newswire.