Enter a clue or pattern or both:
The Clue
Dark red minerals (7 letter answer)
The Answer
RUTILES
Tags
Notes
The answer RUTILES is so rare that it appears less than once every 2500 puzzles.
Definition
RUTILE as a noun:
1. a mineral consisting of titanium dioxide in crystalline form; occurs in metamorphic and plutonic rocks and is a major source of titanium