Yes, GEOPHAGY is a Scrabble word!

Letter values in Scrabble US: G 2, E 1, O 1, P 3, H 4, A 1, G 2, Y 4.

Is it a valid word?

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

eating earth, clay, chalk; occurs in some primitive tribes, sometimes in cases of nutritional deficiency or obsessive behavior