The Hope One Was Once Mailed to the Smithsonian
This page is the CodyCross answer for the clue below from Treasure Island, Group 1028, Puzzle 3 (Broken Compass).
Question is: The Hope One Was Once Mailed to the Smithsonian
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.