Sterling silver brooch, Ag 925/1000. Jewel inspired by wonderful calla lily. With closing pin on the back side. Gemstone characteristics: Type: Natural gemstone - pearl. Country of origin: Japan. Carat weight: 1.26 ct. Round cut, smooth, diameter 5.5 mm. Color: Pinky-orange, characteristic pearl luster. Clarity: AA. Luster: AAA. Hardness: 3.5 Mohs. Specific gravity: 2.60 - 2.85. Refractive index: 1.52 - 1.66. Pearls should be cleaned only with a soft cloth or a mild soap solution. Avoid pearl contact with (even weak) acids or alkalis (eg. champagne). Pearls require an air humidity for perfect shine, therefore we have to wear it from time to time or at least unload it to fresh air. Dimensions approx. 37x8mm.