Yes, HOLOGRAPH is a Scrabble word!

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

Is it a valid word?

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

handwritten book or document
the intermediate photograph (or photographic record) that contains information for reproducing a three-dimensional image by holography