noun🔗Share红玉髓，玛瑙 A hard, reddish brown chalcedony; used in jewelery,"The antique necklace featured a smooth, oval carnelian as its centerpiece. "那条古董项链的中心装饰是一颗光滑的椭圆形红玉髓.materialgeologymineralcolorChat with AIVocabulary GamePractice Reading
