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.

Mineral compound used as a diamond substitute — CodyCross Answer | CodyCross Solutions