珠 - pearl, gem, jewel

pearl

jewel; gem

calculation on an abacus

rosary; string of prayer beads

ovule

precious orb

jewel; pearl; gemstone

lemniscate

dark blue gem allowing one to recall memories when stroked with one's hand (allegedly possessed by Zhang Yue)

Chaetomorpha algae; Chaeto

pearl disease

Pearl River (China); Canton River; Zhu Jiang; Chu Chiang