In detail



Surname: Moonstone
other names: Moonstone
mineral class: Framework silicates
chemical formula: KAlSi3O8
Chemical elements: Potassium, aluminum, silicon, oxygen
Similar minerals: Orthoclase
colour: White
shine: Glass gloss
crystal structure: monoclinic
mass density: 2,5
magnetism: not magnetic
Mohs hardness: 6
stroke color: White
transparency: transparent to translucent
use: Gemstone

General information about the Moonstone:

Of the moonstone describes a type of orthoclase and is therefore counted among the feldspars that make up over eighty percent of the material in the earth's crust. The moonstone owes its name to its characteristic and delicately shimmering color scheme, which is reminiscent of the light of the moon. He is also known in the German-speaking countries under the names Ceylon Opal, Wolfsauge or Hecatolith. The moonstone is of perfect cleavage, has an uneven or shell-like breakage, and is slightly transparent, but it can also be completely transparent. It appears colorless or white, and has a pale shimmer that changes to bright blue or yellow, which in technical language is called adularescence. The gloss is usually glassy, ​​but can also be reminiscent of mother of pearl in strongly shimmering species. As an orthoclase variety, moonstone is one of the skeletal silicates and consists of the elements aluminum, potassium and silicon. It forms massive or granular aggregates and tabular or prismatic crystals. Gemini formation is common in moonstones.

Occurrence and localities:

Moonstones are widespread and are promoted worldwide. Among the countries in which important deposits of this coveted orthoclase variety are located are mainly Sri Lanka and India, but also Brazil, Tanzania, Burma, the United States and Austria. However, by far the most beautiful and valuable specimens are produced in Sri Lanka and India, with the stones of these two countries differing significantly in appearance. The moonstones from Sri Lanka are characterized by their perfect transparency and their milky white color, which brings a delicate blue shine to light. The specimens promoted in India, however, have a beige to light brownish, slightly greenish or orange background and show pronounced shadow play, reminiscent of the movement of clouds.

Use of the moonstone:

The moonstone has been closely associated with the activity of the moon since ancient times. People still believed in the Middle Ages that wearing a moonstone on their bodies or placing them under their pillows could save them from moonlight and believed that they could recognize the individual phases of the moon in their dazzling mineral. In addition, this particularly beautiful Orthoclase variety has long been considered a fertility stone and has been worn by women in many cultures around the world or sewn into garments to entice lovers and increase the chances of conception.
Even today it is used in the esoteric against various ailments and mental upsets, but plays economically, mainly as a gemstone a significant role. Today, the moonstone is most often processed in coveted cabochon cut to pieces of jewelery such as rings, pendants or earrings made of silver, because the round and oval appearance of the whitish blue shimmer is particularly effective in every movement to advantage.