Where did Chemical Element Used To Make Vivid Blue Glass appear in the Game?

It appeared on Deserts of the world Group 1618 Puzzle 4

Chemical Element Used To Make Vivid Blue Glass

CodyCross Chemical Element Used To Make Vivid Blue Glass Solution

This question is part of CodyCross Deserts of the world > Group 1618 > Puzzle 4.
Answers of Chemical Element Used To Make Vivid Blue Glass might change from time to time on each game update.

Chemical Element Used To Make Vivid Blue Glass

Cobalt

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