Pair of Ear Ornaments, c. early 1st century, 1-13/16 x 1-5/8 x 3/4 in. (4.6 x 4.1 x 1.9 cm), Shell, Thailand, 1st century BCE - 1st century CE, Before the adoption of jade, metal, and beads for fine jewelry, in much of Southeast Asia polished shell w