About the main stone of the jewelry Tanzanite - the mineral can be considered one of the youngest stones in history - it was discovered in 1967 at the foot of Mount Kilimanjaro. At first, tanzanite was mistaken for sapphire and no one attached any significance to it. Later, studies showed that the blue gem is a type of zoisite stone - a fairly well-known mineral that is not used in jewelry. It is a transparent, fragile and soft mineral. The stone has pleochroism - the ability to change shades depending on the viewing angle. This means that if you look at tanzanite from different sides, the colors will seem different. In daylight, they seem blue, and indoors they change color to purple. About the precious metal Silver - silver jewelry that has not been coated with any kind of coating has a natural look and color. Uncoated products have a moderate shine, which increases with polishing. The lack of treatment mattes the surface over time, oxidation is permissible on it. Silver is a universal metal that almost never causes allergic reactions. Among the disadvantages of silver jewelry without a coating is its darkening, which occurs over time, which can be eliminated by cleaning it if necessary., Rhodium-plated silver - a coating with a thin layer of rhodium (a platinum group metal) protects silver items from blackening and allows you to preserve the shine. The appearance of products with a rhodium coating is distinguished by a shinier and whiter surface. ?1637762296