White opal is opal with light body tone, occurring as common or precious opal types.

White sapphire is the colorless variety of corundum valued for durability and brilliance.

White spinel is the colorless to near-colorless variety of spinel used in fine jewelry.

Yellow apatite is a calcium phosphate gem variety valued for bright yellow color.

Yellow jasper is an opaque chalcedony variety colored by iron-bearing components.

Yellow sapphire is the yellow color variety of corundum valued for durability and bright color.

Yellow topaz is a durable topaz color variety used in faceted jewelry gems.

Zebra jasper is a patterned ornamental stone category defined by high-contrast striping.

Zircon is a natural zirconium silicate gemstone known for high dispersion and brilliance.

Zoisite is an orthorhombic sorosilicate species encompassing several gem varieties.