•Feldspars are the most diverse and widespread minerals in the earth’s crust.•Moon

•Feldspars are the most diverse and widespread minerals in the earth’s crust. •Moonstone is the most familiar gem-quality member of the feldspar group. •Moonstone is a part of the feldspar group, and is a variety of the species orthoclase within that group. •Moonstone is a composite of two feldspar minerals, orthoclase and albite. After the orthoclase and albite have come together they cool and separate into alternating layers that are stacked on each other. •Moonstone is known for having an ethereal misty glowing look. This phenomenon is called adularescence. •Adurlarescence is occurs when light falls between the stacked layers of orthoclase and albite and scatters it. •Rainbow moonstone has a multicolored adularescence over a light bodycolor. However it is not actually moonstone. It is a variety of labradorite (often from Madagascar) and rainbow moonstone is a trade misnomer. *The necklace features moonstones and labradorite set in silver. It was made by Danish Designer Georg Jensen between 1915-1927 and currently resides at the Victoria & Albert Museum.* -- source link

More pics about