"Tento prsten právě dorazil dnes, takže zatím nemohu říci nic o kvalitě, pokud jde o to, jak dobře se nosí. (někdy mohou být šperky velmi lesklé & pretty when brand new but quickly loses it's brillance & také se snadno poškrábe atd). I haven't decided if I'm going to keep it or return it. Jeden [...]
Archivy značek: 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. Čtyři, discoloration effect The phenomenon that the color [...]