Enter a clue or pattern or both:
The Clue
Crystalline mineral: Var. (7 letter answer)
The Answer
FELSPAR
Tags
Notes
The answer FELSPAR is so rare that it appears less than once every 2500 puzzles.
Definition
FELSPAR as a noun:
1. (feldspar, felspar) = any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium