Yes, GIRASOL is a Scrabble word!

Letter values in Scrabble US: G 2, I 1, R 1, A 1, S 1, O 1, L 1.

Is it a valid word?

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

an opal with flaming orange and yellow and red colors
tall perennial with hairy stems and leaves; widely cultivated for its large irregular edible tubers

Also: fire opal, jerusalem artichoke, jerusalem artichoke sunflower, helianthus tuberosus.