June Birthday Stone: How to Identify Moonstone?

Moonstone has a charming aura. In recent years, due to its particularity, it has attracted the favor of more and more jewelry lovers. Although the gem is good, you must have a method of identification to avoid being cheated. Next, the constellation knowledge will tell you how to identify the moonstone. Let's have a look.

The gemstones with similar color and transparency to moonstone are mainly white quartz cat's eye, chalcedony, white opal, glass and plastic (no one will use quartz cat's eye, chalcedony and opal to fake moonstone because they are more expensive). The important difference between moonstone and them is that the halo of moonstone is extremely special. When a gem rotates, it often moves in a flake shape, while the quartz cat's eye moves in a straight line. Feldspar cleavage is obvious, hackly fracture can be seen in some small sections, and other similar gems are mostly conchoidal fracture with smooth cambered surface. There are sometimes millipede-like inclusions in moonstone, which can be used as an important basis for identification.

When the above characteristics are not obvious, it is necessary to distinguish them by measuring the refractive index and specific gravity of gems. Identify key typical cleavage and characteristic inclusions. The blue of moonstone is crystal clear, and the transparency of moonstone is also very high. Good quality moonstone will be translucent, and the moonlight eye is right in the middle. In essence, the identification method of moonstone is based on the unique characteristics of gemstones, such as color, transparency, luster, hardness, specific gravity, inclusion, dispersion, cleavage, fracture, birefringence, special optical effect and so on. Identification with simple tools, such as magnifying glass with magnification of 10, spotlight flashlight.

Color and transparency transparency can be used to understand the quality of gems. Generally speaking, the higher the transparency of the same gem, the more precious it is. Transparency can also be used to distinguish gems with similar colors but different kinds.

The luster and hardness of gems are important visual identification basis, which can roughly determine a satisfactory refractive range. Gloss is determined by refractive index and smoothness of polished surface. Some gems with similar appearance can be distinguished by testing their hardness. Two points should be paid attention to when distinguishing gems by hardness. First, some gems with similar colors have similar hardness, such as zircon and purple tooth black; Secondly, there is nothing we can do about artificial gem, because artificial gem is very similar to natural gemstones in physical properties. Don't push too hard when testing, especially don't knock and grade, but drag and grade slowly.

It is a secret trick for experienced appraisers to estimate the specific gravity and dispersion manually, which needs more practice to master.

Observing inclusions Observing the characteristics of inclusions in transparent gemstones with a magnifying glass 10 times is the most reliable method to distinguish natural products from man-made products. The inclusions in natural gemstones can be solid, liquid and gas, and most of the solids are in crystal form. There are many bubbles in artificial gem, and the swirling solid inclusions are inclusions of synthetic gems.

It is particularly important to identify some gems by looking at fracture, cleavage fracture and luster of fracture. The stones with glass luster are mostly conchoidal fracture, while the translucent and opaque jade are mostly granular and hackly fracture.

Birefringence and Multicolor With a magnifying glass of 10 times, you can see the double image of the edge of a partially inverted transparent gem, which is also an important basis for identifying gems.

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