Nice necklace of faceted natural tanzanites. The stones are all natural , not heated , not colored. Tanzanites are not deep blue in color because not been heated and not treated. Stones with beautiful shine especially in natural light. Length of the necklace : 47 cm Diameter tanzanites : 3.8 -- 4 mm. Necklace weight: 12 g Clasp silver 925. The necklace is new and made in Italy. Note : the tanzanite is a pleochroic mineral, therefore its color varies from blue to blue-violet , also depending on the type of light source. Necklace photographed under bright light.