{Bristol board}, a kind of fine pasteboard, made with a
smooth but usually unglazed surface.
{Bristol brick}, a brick of siliceous matter used for
polishing cultery; -- originally manufactured at Bristol.
{Bristol stone}, rock crystal, or brilliant crystals of
quartz, found in the mountain limestone near Bristol, and
used in making ornaments, vases, etc. When polished, it is
called {Bristol diamond}.