Enter a clue or pattern or both:
The Clue
It's around 6 on the Mohs scale (4 letter answer)
The Answer
OPAL
Tags
Notes
The answer OPAL is very common and appears about once every 41 puzzles.
Related Clues
Gem
Gemstone
Girasol
Hyalite
Australian export
Australian gem
Brooch stone
Cacholong or hyalite
Fiery gem
Fiery gemstone
Fire ___ (gem)
Form of silica
A gem of a lady?
Girasol, e.g.
Iridescent stone
Jewel of a girl
Milky gem
Oct. birthstone
October birthstone
Oculus mundi
Queensland gem
Ring setting
Shimmering stone
Birthstone for many Libras
Birthstone for most Libras
Destructive 1995 hurricane
Gemstone for most Libras
Libra-Scorpio stone
Milky white gem
Stone for a Libra, traditionally
Stone of many Libras
Common name for hydrous silica
It has a play of colors
It's worn by many Libras
Stone made of silicon and oxygen
Definition
OPAL as a noun:
1. a translucent mineral consisting of hydrated silica of variable color; some varieties are used as gemstones