A Football Formation Like a Precious Gem

Puzzle 2 of Alliteration Piece of Cake Pack

Question is: A Football Formation Like a Precious Gem

and the answer is: 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.

A football formation like a precious gem Alliteration Answers | CodyCross Solutions