Chinese porcelain making began around 500 BC, china has a 5500 thousand history of pottery making. They were exporters of their wares and the Portuguese were the first to bring it into europe in the 16th century. European attempts at imitations of chinese porcelain began soon enough, but lacking the chinese Kaolin clay needed to make true translucent ware it was quite a while before something resembling chinese ware was marketed, as porcelain, which it was not. It kinda sorta looked like it. It became a huge fad none the less. Your best kaolin clay, 2nd only to chinese, is found in the state of Georgia btw.
Did some of it, european or chinese porcelain, make it to the colonies? Most probably, certainly in well off families ape'n the european porcelain craze. Would it show up at a rondy, not likely but still possible. Those out west weren't unaware of fashions back east.
dp
Here's a porcelian lidded bowl I made sometime in the late 70's (Georgia kaolin):
