“This ring just arrived today so I cannot yet say anything about the quality as far as how well it wears. (sometimes jewelry can be very shiny & pretty when brand new but quickly loses it’s brillance & also scratches easily etc). I haven’t decided if I’m going to keep it or return it. One […]
Метка архива: silver bangle manufacturers
3. Color changing effect The color produced by the interference and diffraction of the special structure of the gemstone changes with the light source or the observation angle. This optical phenomenon is called the color change effect. Opal is a typical gemstone with a color changing effect. Четыре, discoloration effect The phenomenon that the color […]