Crossword puzzle clue "dark fine grained rock"

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Here are the possible solutions for dark fine grained rock clue

Answer
Clue
Relevancy
basalt
Clue
Dark fine-grained rock.
Fine-grained rock
Definition
an igneous volcanic rock
chert
Clue
Fine-grained rock
Definition
a microcrystalline form of silica, occurring as several varieties, aka hornstone
shale
Clue
Fine-grained rock
Fine-grained sedimentary rock
slate
Clue
Fine-grained rock
agate
Clue
Fine-grained chalcedony
Definition
a variety of quartz
aplite
Clue
Fine-grained granite
Definition
a fine-grained, light-coloured igneous rock, also HAPLITE

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