Black volcanic glass.
The first hint to crack the puzzle «Black volcanic glass.» is:
It is a word which contains 8 letters
The second hint to crack the puzzle «Black volcanic glass.» is:
It starts with letter O
O
The third hint to crack the puzzle «Black volcanic glass.» is:
It ends with letter N
O
n
Looking for extra hints for the puzzle «Black volcanic glass.»:
Click on any empty tile to reveal a letter
O
n
The answer for the puzzle «Black volcanic glass.» is:
O
b
s
i
d
i
a
n