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Porcellanite

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A group of siliceous-rocks that have the texture, lustre and conchoidal fracture of porcelain.

Note: This name is also used for a burned metamorphic rock, see porcellanite (metamorphic).

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 Porcellanite

Sub-divisions of Porcellanite

Mineralogy of Porcellanite

Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
Opal-AA petrological term for Opal-A.
Silica > Opal-CTSiO2 · nH2O
Silica > QuartzSiO2

Other Names for Porcellanite

Name in Other Languages:

References for Porcellanite

Reference List:
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 Porcellanite

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