The Shape of a Baseball Field

This page is the CodyCross answer for the clue below from Extraordinary Creatures, Group 1597, Puzzle 5 (Hound of Hades).

Question is: The Shape of a Baseball Field

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.

The shape of a baseball field — CodyCross Answer | CodyCross Solutions