The beauty of gems comes first in color. 加えて, transparency and luster are all its charms.
Transparency refers to the ability of a gemstone to transmit light. Usually divided into: 透明, 半透明の, 半透明の, 半透明の, 不透明な. 透明性: easy to see through the light, clear bottom, the outline and details of the scene can be clearly seen through the gems; 半透明の: less light can pass through, but the scene can be seen through the gems, but it is a little fuzzy; 半透明の: transparent It is difficult to see through; sub-translucent: a small amount of light can be transmitted at the edge of the gem; opaque and opaque.
In the observation of gem transparency, gem transparency is affected by factors such as the thickness of the gem, its own color, the way of particle bonding, 不純物, そしてひび割れ.
The luster of a gemstone refers to the ability of a gemstone to reflect light, which is a kind of surface brilliance. The strength of the gem’s luster is related to the smoothness of the gem surface, the polishing quality, the combination of mineral particles, the refractive index, the reflectivity and the absorption ratio. Luster is also one of the important properties of gems.
Luster from strong to weak: 金属光沢, diamond luster, ガラスの光沢, グリース光沢, waxy luster; 加えて, there are special luster, such as pearl luster, silk luster, earthy luster and between diamond luster and glass luster The semi-diamond luster in the middle, the more weathered turquoise shows a dull, earthy luster.
To observe the gloss, it is necessary to use reflected light to observe the surface gloss characteristics of the polished surface, rough surface and fracture of the gem.
The clarity of a gemstone refers to the impurities or blemishes contained in the gemstone. In some opaque gemstones, it also often refers to cracks.
Transparency is easily confused with clarity. Sometimes there is almost no impurities inside a gem, but it is not too transparent and looks foggy, so the brightness of the gem will be greatly affected, but the color will not be affected. The internal impurities of a gem with good transparency are easy to see and will affect the accuracy of its clarity evaluation. したがって, comprehensive evaluation should be made when evaluating the clarity and transparency of the gem.