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The most useful ceramics for dating are the glazed, relatively highly fired, fine-bodied earthenwares common since the late eighteenth century.
By around 1750, European ceramic manufacturers had begun a concerted effort to mass-produce fine-bodied, durable earthenwares for the world market.
Instead, archeologists have to be a bit more creative.
Pipes were very common in colonial times following the introduction of tobacco to England in the late 16th century.
A known manufacturing date tells us that the site cannot be older than the object, but that doesn’t mean that the site is not a lot younger. The presence of these things can throw off the mean ceramic date. In an ideal world, every deposit would contain a dated penny.