Chemical Element Used to Make Vivid Blue Glass

This page is the CodyCross answer for the clue below from Night Life, Group 1758, Puzzle 3 (Constellations).

Question is: Chemical Element Used to Make Vivid Blue Glass

and the answer is: COBALT

Word Meaning:

COBALT — A chemical element (symbol Co) with an atomic number of 27: a hard, lustrous, silver-gray metal.

Definitions from Wiktionary.

Chemical Element Used To Make Vivid Blue Glass - Night Life CodyCross Answers | CodyCross Solutions