"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. един [...]
Архиви на етикети: 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. Това оптично явление се нарича ефект на промяна на цвета. Опалът е типичен скъпоценен камък с ефект на промяна на цвета. Четири, discoloration effect The phenomenon that the color [...]