__ in the Rough

This page is the CodyCross answer for the clue below from Chile, Group 2281, Puzzle 1 (Easter Island).

Question

__ in the Rough

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.