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Porcellanite or porcelanite, is a hard, dense rock somewhat similar in appearance to unglazed porcelain. It is often an impure variety of chert containing clay and calcareous matter.[1]

At Tievebulliagh, Northern Ireland porcellanite is a tough contact metamorphosed hornfels formed from a lateritic soil horizon within a basaltic intrusive/extrusive sequence. It is the site of a Neolithic axe or stone tool quarry.[2]


  1. ^ Porcellanite, Encyclopædia Britannica Premium Service. [1]
  2. ^
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Porcellanite". A list of authors is available in Wikipedia.
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