argillite
Noun
Meaning
Argillaceous schist or slate; clay slate. Its colors is bluish or blackish gray, sometimes greenish gray, brownish red, etc.
Source: Webster's dictionarySynonyms
adobe
flake
agate
alabaster
shale
basalt
chalcedony
soapstone
alluvium
claystone
bentonite
mudstone
ball clay
arenite
arkose
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