Natural Tarnish That Forms on Metals and Stone
This page is the CodyCross answer for the clue below from Circus, Group 96, Puzzle 2 (Ringling Brothers Circus).
Question is: Natural Tarnish That Forms on Metals and Stone
and the answer is: PATINA
Word Meaning:
PATINA — (originally) A paten, flat type of dish.
Definitions from Wiktionary.