Crossword puzzle clue "dark form of quartz"

Here are the possible solutions for dark form of quartz clue

Answer
Clue
Relevancy
onyx
Clue
Dark form of quartz
Definition
a form of chalcedony consisting of plane layers of different colours
greeneggsandham
Clue
Source of "Say! In the dark? Here in the dark! Would you, could you, in the dark?"
smokytopaz
Clue
Dark brown quartz sometimes sold as a gemstone
agate
Clue
Form of quartz
Impure form of quartz, used as a gemstone
Impure form of quartz
Definition
a variety of quartz
agatine
Clue
Resembling a form of quartz.
jasper
Clue
Opaque form of quartz
Definition
a red variety of chert, its color coming from minute particles of included hematite, also JASP, JASPIS

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