Lightning rod with cobalt blue ball.

By Alex Hoffmann; posted December 24, 2013

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These are the same kind of lightning rods we have on our house. We have 6 on our roof, but only 3 have cobalt blue balls on them, the rest are amethyst-or maybe SCA balls. From the street one of the rods appears to be melted looking and leans at a funny angle. Anyone know what kind these are?