pseudomorph

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pseu·do·morph

(sū'dō-mōrf),
A mineral found crystallized in a form that is not proper to it but to some other mineral.
[pseudo- + G. morphē, form]
References in periodicals archive ?
Under PPL, the outlines of former grains that have been pseudomorphed by smectite are evident in the centre of the field-of-view in Fig.
All gradations exist between samples with relict primary clinopyroxene (augite), partially pseudomorphed by actinolite, and accompanied by the remainder of the lower grade assemblages described above, to assemblages with actinolite pseudomorphs exhibiting well-developed blue-green hornblende rims with or without relict pyroxene.
Sample S84-12A was collected about 10 m from S84-12 and is a greenish black garnet amphibolite with garnet grains up to 3 mm mostly pseudomorphed by chlorite.