Crossword puzzle clue "gemstone discovered on mars"

Here are the possible solutions for gemstone discovered on mars clue

Answer
Clue
Relevancy
opal
Clue
Gemstone discovered on Mars
Definition
an amorphous variety of silica
opals
Clue
NASA discovered them on Mars in 2008
Definition
OPAL, an amorphous variety of silica
annee
Clue
Mars to mars, say
agate
Clue
Gemstone
Banded gemstone
Marble resembling a gemstone
Striped gemstone
Semiprecious gemstone
Definition
a variety of quartz

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