U+7899 "碙" CJK Unified Ideograph-# Unicode Character

U+7899 "碙" CJK Unified Ideograph-# is a rare and ancient Chinese character, traditionally classified under the radical for "stone" (石) and pronounced variously as "náo" or "gāng" in Mandarin. It historically referred to a type of stone or mineral, sometimes associated with a kind of fine-grained rock or a specific stone used for sharpening tools, and appears in classical dictionaries such as the Kangxi Zidian. In modern usage, it is seldom encountered in everyday language, but it can be found in specialized historical or paleographic contexts, representing a specialized term within the broader corpus of traditional Chinese characters.