Etched caelian beads originated in the Indus Civilization;this kind of oaments and its manufacturing techniques were spread to the whole Eurasia Continent.The etched caelian beads unearthed in China can be classified into four types,the comparisons of which to their foreign counterparts may reveal their different sources and diffusion routes.The etched caelian beads and their glass imitations unearthed in China had influences to the making of the glass "eye beads" in