U+78F0 "磰" CJK Unified Ideograph-# Unicode Character

U+78F0 "磰" CJK Unified Ideograph-# is a rare and archaic Chinese character composed of the stone radical 石 on the left and the phonetic component 善 on the right, which together suggest a meaning related to a type of fine-grained stone or whetstone. Its historical usage appears in classical Chinese texts, where it primarily denotes a smooth, hard stone used for polishing or sharpening tools, such as a hone or abrasive stone. While not commonly found in modern standard Chinese, the character exists in ancient lexicons and specialized contexts, reflecting the nuanced terminology for stones and minerals in traditional Chinese culture.