Yes, PICKAX is a Scrabble word!

Letter values in Scrabble US: P 3, I 1, C 3, K 5, A 1, X 8.

Is it a valid word?

PICKAX is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

a heavy iron tool with a wooden handle and a curved head that is pointed on both ends