Granitite is valid Scrabble Word

Is granitite a scrabble word?
Official Scrabble Players Dictionary NO
Official Tournament and Club Word List NO
Collins Scrabble Words YES
Is granitite valid Words with Friends?
Words with Friends NO

Definitions for GRANITITE in dictionary:

Words related to GRANITITE

granitites11
Find what other words can be done using letters: "granitite"
https://scrabble-word.com/finder/granitite
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