1.k gold

The "K" of K-gold is the compilation of the foreign word Karat, which is completely expressed as follows: "Karat gold" (that is, K-gold), "AU" or "G" is an international symbol used to express the purity (that is, gold content) of gold. 18K is 75% gold content.

Healing crack

Commonly known as fingerprint inclusion, it is irregular, fingerprint-like, with liquid residue, and it is a crack after the formation of gem crystal, which forms a healing crack after crystallization. Healing cracks in gemstones are very common.

3. Absorption spectrum

Pure white light is a continuous spectrum from red to purple, but when white light passes through colored gemstones, a certain color or wavelength can be absorbed by the gemstones, resulting in one or several discontinuities in the white light spectrum. These discontinuities appear in the form of dark lines or dark bands. Many gems show characteristic patterns of absorption bands or lines in the visible spectrum, and their complete patterns are called "absorption spectra".

4. Burning/not burning

Burning: By heating the gemstone, the color, transparency and purity of the gemstone can be improved for a long time, and then the aesthetic and commercial value of the gemstone can be improved.

Burning: refers to the artificial high-temperature heating of gemstones.

Unfired: refers to natural, unheated gems.

5. original stone

It refers to unprocessed natural ore. In the jewelry industry, we often hear "rough stone", which refers to the natural ore containing some precious stones mined from the mining area, and has not been processed. Such as diamonds and rough stones.

6.bare stone

This is a gem that has been cut, polished, shaped but not yet set. For example, diamonds that are not inlaid.

7. Polychromaticity

In colored gems crystal with optical rotation and anisotropy, the polarization absorption of light in different directions is different because of the different particle arrangement in each direction of the crystal, which is polychromatic.

8. Mine shortage

Generally, it refers to some potholes or crack-like defects formed on the surface of natural gemstones due to their own growth.

9. planar

Refers to a gem with a smooth geometric polished surface. Show the beautiful luster of the gem with some cut surfaces, and improve the fire color and brightness of the gem.

10. Plain noodles

Also known as egg-faced gems and spherical gems, they refer to non-faceted gems. These gems have no regular polished surface, such as round gems.

1 1. carat.

Carat (ct) is the mass (weight) unit of a gem. Now 1 carat is equal to 0.2g or 200mg.. 1ct = 0.2g, and 1ct is subdivided into 100 minutes, such as 50 minutes, that is, 0.5 carat, which is calculated as a relatively small gem.

12. Pavilion Department

The lower part of the gem is the pavilion of the gem, that is, the enjoyment part extends from the waist of the gem to the tip of the gem.