Enter a clue or pattern or both:
The Clue
Crystalline gemstone (6 letter answer)
The Answer
SPINEL
Tags
Notes
The answer SPINEL is so rare that it appears less than once every 2500 puzzles.
Related Clues
Rubylike gem
Ruby ___ (gem)
Definition
SPINEL as a noun:
1. a hard glassy mineral consisting of an oxide of magnesium and aluminum; occurs in various colors that are used as gemstones