This variety of alkali feldspar is of the orthoclase variety. As magma gradually cools, albite within the mineral forms alternating layers which create a shimmering glow known as adularescence. The quality of moonstone varies and may range from a light milky glow to a bright blue glow, with the highest quality displaying a rainbow sheen. Moonstone occurs within igneous rocks such as pegmatite and granite.
As a healing stone, moonstone is used to enhance intuitive sensitivity, relieve anxiety, stress and over-reaction.
