September's Birthstone
This page is the CodyCross answer for the clue below from Space Exploration, Group 912, Puzzle 1 (Aurora Borealis).
Question is: September's Birthstone
and the answer is: SAPPHIRE
Word Meaning:
SAPPHIRE — (countable) A clear deep blue variety of corundum, valued as a precious stone.
Definitions from Wiktionary.