Fool's Gold
This page is the CodyCross answer for the clue below from Forests, Group 1994, Puzzle 4 (Nature Reserves).
Question is: Fool's Gold
and the answer is: PYRITE
Word Meaning:
PYRITE — (mineralogy) The common mineral iron disulfide (FeS₂), of a pale brass-yellow color and brilliant metallic luster, crystallizing in the isometric system.
Definitions from Wiktionary.