mineral

Rainbow Moonstone

White Labradorite (formula: (Na,Ca)(Al,Si)4O8)

AI-generated identification · may be incorrect

Hardness: 6-6.5 Mohs; Color: White or colorless with blue/rainbow 'adularescence'; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect in two directions; Specific Gravity: 2.6 – 2.7

Hardness: 6-6
Color: White or colorless with blue/rainbow 'adularescence'
Luster: Vitreous to pearly

Identified March 24, 2026More mineral →

Explore Rainbow Moonstone in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Formed in both igneous and metamorphic rocks via the cooling of mineral-rich fluids. It specifically develops through the alternating intergrowth of orthoclase and albite, which creates the light-scattering effect.

Uses & applications

Primarily used as a gemstone in necklaces, rings, and earrings. It is also highly sought after by metaphysical collectors and for lapidary arts.

Geological facts

Despite its common name, 'Rainbow Moonstone' is technically a transparent variety of Labradorite rather than a true Orthoclase Moonstone. The shimmer is called 'labradorescence' when it flashes multiple colors.

Field identification & locations

Identify in the field by its distinct blue flash when rotated under light and its characteristic cleavage planes. It is commonly found in India, Sri Lanka, Madagascar, and Australia.