December's Birthstone, Oldest Mineral on Earth

This page is the CodyCross answer for the clue below from Forests, Group 1991, Puzzle 4 (Soil Composition).

Question is: December's Birthstone, Oldest Mineral on Earth

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.

← Forests Puzzle 4 Group 1991 Answers

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