Introduction to Moonstone

Moonstone

Introduction to Moonstone

Moonstone English name moonstone. 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.

There are many gemstones that have a moonlight effect in nature, but they can only be called moonstones when the feldspar minerals have this effect. Other gemstones cannot use the moonstone name even if they have a moonlight effect.

Moonstone is a kind of feldspar and is an 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 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 is considered a variant of Orthodox.

Moonstone

Moonstone variety

Moonstone is a feldspar mineral with a moonlight effect. 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. The refractive index is 1.518~1.526, and the relative density is less than 2.62. Some small cleavage often occurs on the convex curved gemstone belt.

The ice-long moonstone is a translucent cloud-like shape. After being formed into a curved shape, it has a play color, showing a sky-blue milky white luster, also known as "your moonstone."

Sodium long moonstone, a pearl feldspar with pearl luster, or albite with moonstone characteristics.

Long moonstone, a labradorite with moonstone characteristics, this moonstone has a yellowish brownish blue light.

Moonstone

North Korean Moonstone is a mixed type of moonstone. In addition, Sri Lankan opal, wolf stone, water protein, fisheye, etc., are also among the moonstone varieties.

Moonlight stone gentle halo, also known as ice feldspar faint, is caused by the interference of light diffuse reflection by some fine albite double-chips in feldspar. The redder and thinner the bimorph, the brighter the moonlight is formed. When processed, it can sometimes form a bright band like a "cat's eye" and exhibit a light blue light wave.

Moonstone origin

Native moonstones are produced in special veins and pegmatite veins, but are valuable from sand mines and weathered layers. In addition, some people think that the ancient Chinese Herbs is a moonstone. Moonstone is distributed in the Alps of Sri Lanka, Myanmar, India, Brazil, Mexico and Europe, and is also produced in Inner Mongolia. Among them, Sri Lanka is the most precious. 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.

Identification of moonstone

The gems similar to the moonstone are mainly white quartz cat's eye, chalcedony, white opal, glass and plastic. The important difference between moonstone and them is:

1. Moonlight's fainting is extremely special. When turning a gemstone, it tends to move in a sheet shape, while the quartz cat's eye shows a linear movement of the eyeliner.

2. Feldspar has obvious cleavage, and there are jagged fractures in some small sections, while other similar gemstones are mostly shell-shaped fractures, and the fractures are smooth curved surfaces.

3. Inside the moonstone, there are sometimes “100-footed” inclusions, which can be used as an important basis for identification. When the above characteristics are not obvious, it is determined by measuring the refractive index and specific gravity of the gemstone. Identify key typical cleavage, feature inclusions.

Moonstone value and purchase

The price of moonstone is mainly affected by the beauty of the jewel, the size of the gemstone, the amount of enamel, transparency and processing quality. In fact, moonstone is not very expensive, even the true quality of the moonstone, can only be regarded as a mid-range gem (because of the huge output), the moonlight in the general mall will be very expensive to buy.

A 6mm*8mm ring face is prevailing. The wholesale price in Beijing is 15~30 yuan/grain, and the retail price is slightly higher, about 25~45 yuan per piece. If it is inlaid, the price ranges from 50 to 300 yuan (based on the mosaic metal used).

The moonstone produced in China is not worse than foreign ones, but the price is very cheap. The larger particles (more than 2 carats) of moonstone in the market are not uncommon, but there are not many perfect photos. Many moonstones are faint, or not bright enough, or deviate from the center of the gem, affecting the aesthetics of the gem and lowering the price. In addition, some of the gemstones have a thicker structure, cleavage is obvious or cracks occur, and low transparency also lowers the price of the gemstone. The moonstone is ground into a gemstone, and the lower part of the gemstone is too thick to affect the inlay of the gemstone and reduce the price per gem. The evaluation is perfect and the “moonlight” is gentle and bright.

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