Long thin square chop made of pure white jade. It dates from the late Qing (1644 - 1912) or early Republic period (1912 - 1949). The carving of the inscription is well done. It reads：珠玉為心 (zhu yu wei xin)。The chop was acquired in Hong Kong in 1992. Length 3.9 cm. Width 0.8 cm. Depth 0.8 cm. Weight 7.0 grams.