Sedimentary Rock Infused With Fe Metal

This page is the CodyCross answer for the clue below from Street Fair, Group 1310, Puzzle 3 (Amateur Musicians).

Question is: Sedimentary Rock Infused With Fe Metal

and the answer is: IRONSTONE

Word Meaning:

IRONSTONE — Any ore of iron which is impure through the admixture of silica or clay.

Definitions from Wiktionary.