Browse
Mysteries
Leaderboards
This Month
Hall of Fame
How It Works
Shop
Puzzle Books
Apparel
Upload
▶ Play
Log In
Join Free
← Browse all challenges
Can YOU identify this?
by
FrostLogic
· 6 guesses ·
brutal
Play this challenge →
Share this challenge
↗ Share
X
f
WA
Copy link
More geology close-ups
See all
malachite mineral surface
agate geode banding
feldspar cleavage surface
serpentinite rock surface
flint fracture surface
used match head (macro)