Nature's Hardest Mineral
This page is the CodyCross answer for the clue below from Fantasy World , Group 878, Puzzle 5 (Hippocampus).
Question
Nature's Hardest Mineral
Answer
DIAMOND
Word Meaning:
DIAMOND — (uncountable) A glimmering glass-like mineral that is an allotrope of carbon in which each atom is surrounded by four others in the form of a tetrahedron.
Definitions from Wiktionary.