English name: moonstone. (Moonlight effect: When the white light is on the gemstone, the interference color is generated due to the special structure inside the gemstone, and the white to pale blue flash is visible on the gem surface, just like the moonlight. This is because the feldspar is dissolved in sodium. The stone and albite are oriented in the feldspar crystal. The layered crystals of the two feldspars are parallel to each other, and the refractive index is slightly different and the interference color appears.
It consists of two kinds of feldspar mixes. Among them, a mixture of ice feldspar and albite is the most common. The good quality moonstone is translucent and has a blue light like a wave. Poorly turbid. The lower level only has a halo and no blue light. Moonstone belongs to the biaxial crystal.
Moonstone has a refractive index of 1.518~1.526, and the relative density is less than 2.62. There are often some small cleavage on the convex curved gemstone belt. According to this, it can be distinguished from similar chalcedony, opal (opper), glass or plastic. Moonstone emits pink fluorescence under short-wave UV radiation, while there is no or only weak fluorescence under long-wave UV. There is blue or violet blue fluorescence under X-rays.
It should be pointed out that there are many gemstones with a moonlight effect in nature, but they can only be called moonstone when the feldspar mineral has this effect. Other gemstones cannot use the moonstone name even if they have a moonlight effect.
Native moonstones are produced in special veins and pegmatite veins, but are valuable from sand mines and weathered layers. Important places of origin: Sri Lanka, India, Myanmar, Brazil, Madagascar, the United States, Australia. China's Inner Mongolia is also produced. In addition, some people think that the ancient Chinese Herbs is a moonstone.
Moonstone is a kind of feldspar, aluminosilicate of sodium and potassium. It is a layered mineral with two layers. The two layers interact with each other to scatter light, and the cleavage interferes with or interferes with light. The combined result can produce a moonlight effect, so it is called moonstone and has a high grade. Moonstone has a drifting blue light, and a few moonstones have a cat's eye effect.
Moonstone has beautiful silver and light blue smudges and is used as a gemstone. The halo feldspar and labradorite in the feldspar series of the Changshi people are also called moonstone [1], because they can all show beautiful smudges. Moonstone English name is MOONSTONE, literal translation is moonstone. Because it tends to be milky white, translucent with a light blue halo, as if the moonlight is clear after the rain in March, hence the name moonstone. For centuries, the gentle halo of moonstone, also known as ice feldspar, has been produced by the interference of diffuse reflection of light by some fine albite twin-chips in syenite. Moonstone is one of the favorite gems. People believe that it can arouse the gentle enthusiasm of the sweetheart. Together with the pearl and the stone, it is the lucky stone of the birth of the June, symbolizing wealth and longevity. It is also the lucky stone of Scorpio from November 3 to November 13.
Moonstone feldspar belongs to orthorhombic system with a density of 2.56, a refractive index of 1.52-1.53, and a double fold of 0.006.
Moonstone emits pink fluorescence under short-wave UV radiation, while there is no or only weak fluorescence under long-wave UV. There is blue or violet blue fluorescence under x-rays. It should be pointed out that there are many gemstones with a moonlight effect in nature, but they can only be called moonstone when the feldspar mineral has this effect. Other gemstones cannot use the moonstone name even if they have a moonlight effect.
Because the high-quality moonstone has a light blue halo, like the moonlight, it is called moonstone. Generally milky white, translucent, with a light blue halo. The moonstone is a pair of potassium and albite, which are alternately arranged to form a lattice-structured micro-plagioclase. The thickness of the lattice double layer is very thin, between 50-100 nm, the two sets of nearly perpendicular double crystal lines, which scatter the human light, and the dense scattered light is concentrated together, which shows a faint halo. The most valuable moonstone should show a blue halo, and the moonlight with a white halo is of lower value. The halo of the moonstone is directional, and the direction of the blooming should be consistent with the shape of the jewel. It should be concentrated in the center of the gemstone. If the faint is skewed in the gem, it will affect the value.
Moonstone is usually colorless to white, transparent - translucent. The characteristic is that when viewed at a certain angle, there is a luminous effect that is almost always a mixture of two (or more) types of feldspar, usually feldspar and albite. Some moonstones contain quite a lot of albite, which is closer to albite than feldspar. But on the whole, Moonstone considers the variant of feldspar.
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