Mineral Compound Used as a Diamond Substitute
This page is the CodyCross answer for the clue below from Medieval Times, Group 223, Puzzle 1 (Feudal Society).
Question is: Mineral Compound Used as a Diamond Substitute
and the answer is: ZIRCON
Word Meaning:
ZIRCON — (uncountable) A mineral occurring in tetragonal crystals, usually of a brown or grey colour and consisting of silica and zirconia.
Definitions from Wiktionary.