The beauty of gems comes first in color. В допълнение, transparency and luster are all its charms. Transparency refers to the ability of a gemstone to transmit light. Usually divided into: прозрачен, полупрозрачен, полупрозрачен, полупрозрачен, непрозрачна. Прозрачност: easy to see through the light, clear bottom, the outline and details of the scene can be clearly […]
