Yes, DURIAN is a Scrabble word!

Letter values in Scrabble US: D 2, U 1, R 1, I 1, A 1, N 1.

Is it a valid word?

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

tree of southeastern Asia having edible oval fruit with a hard spiny rind
huge fruit native to southeastern Asia `smelling like Hell and tasting like Heaven'; seeds are roasted and eaten like nuts

Also: durian tree, durio zibethinus.