Two meanings: (1) the gem — naturally dark pearls from Pinctada margaritifera, iconic export of Tahiti; (2)
黑珍珠餐厅指南, a Chinese fine-dining list launched by Meituan-Dianping in 2018 and positioned as a domestic rival to the Michelin Guide. Uses
钻 (diamonds, 1-3) instead of stars.
