Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Pegmatoid

A rock subtype
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A term proposed for both feldspathoidal pegmatites and for pegmatites without graphic texture (Shand, 1910, p. 377; Tröger 951; Tomkeieff p. 422).

Perhaps most commonly used nowadays for rocks similar to pegmatites s.s. but not fitting the grain size or origin. They don’t always fit the pegmatite definition of an average grain size above 1 cm, but can be just an abnormally coarse grained crystalline rock, often metasomatic or formed by regional metamorphism.


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Unique IdentifiersHide

Mindat ID:
50313
Long-form identifier:
mindat:1:1:50313:2

Similar NamesHide

PegmatyteA synonym of Pegmatite

Classification of PegmatoidHide

Pronunciation of PegmatoidHide

Pronunciation:
PlayRecorded byCountry
Jolyon RalphUnited Kingdom

Synonyms of PegmatoidHide

Internet Links for PegmatoidHide

References for PegmatoidHide

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