Although called the Silk Route, a wide variety of material goods were carried along its tracks, including silk, precious gems and metals like jade and gold, horses, apricots, melons, raisins, and lacquerware. More importantly, the Silk Route also carried people, and so its use spread technological advances such as medical science from India and religions such as Buddhism and Islam. It was probably also along the Silk Route where industrial espionage--the secret of silk manufacture--was passed.
Sources
For more detailed information see the article Along the Silk Road.
Dani, Ahmad H. 2002 Significance of Silk Road to human civilization: Its cultural dimension. Journal of Asian Civilizations 25(1):72-79.
Liu, Z., et al. in press. Influence of Taoism on the invention of the purple pigment used on the Qin terracotta warriors. Journal of Archaeological Science.
Powell, William F. 1996. Silk Route. Pp. 646-648 in Brian Fagan (ed). 1996. The Oxford Companion to Archaeology. Oxford University Press, Oxford, UK.


