Huttonite is a thorium nesosilicate mineral with the chemical formula ThSiO₄ and which crystallizes in the monoclinic system. It is dimorphous with tetragonal thorite, and isostructual with monazite. An uncommon mineral, huttonite forms transparent or translucent cream-colored crystals. It was first identified in samples of beach sands from the West Coast region of New Zealand by the mineralogist Colin Osborne Hutton (1910-1971). Owing to its rarity, huttonite is not an industrially useful mineral.