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A rock, semivitrified clay or shale, somewhat resembling jasper, composed of mullite and other high-temperature silicate and oxide minerals.
Formed due to combustion metamorphism (e.g., burning coal seams and dumps, mine fires).

Classification of Porcelanite

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Other Names for Porcelanite

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Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Porcelanite

Reference List:

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Ernst, W.G. & S.E. Calvert (1969), An experimental study of the recrystallization of porcelanite and its bearing on the origin of some bedded cherts: Amer. Jour. Sci.: 267A: 114-133.

Internet Links for Porcelanite

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  • Localities for Porcelanite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    • California
      • San Luis Obispo Co.
    Ernst, W.G. and S.E. Calvert (1969) An experimental study of the recrystallization of porcelanite and its bearing on the origin of some bedded cherts. American Journal of Science: 267A: 121; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 354.
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