Moonstone: Colorless; also white to yellowish, and reddish to bluish gray
Garnet (hardness: 6.5-7.5 Mohs)
A group of silicate minerals
Specific gravity: 3.5-4.3
Almandine: Orangy red to purplish red
Almandine-spessartine: Reddish orange
Andradite: Yellowish green to orangy yellow to black
Demantoid: Green to yellow green andradite
Topazolite: Yellow to orangy yellow
Grossular: Colorless; also orange, pink, yellow, and brown