Precious stones are known for being rare and very hard, two properties that do not carry any aesthetic value to a stone, but which should be considered as factors of preciousness because they also influence its value. Both, however, lose all virtues if they are not accompanied by beauty, which is the result of different factors: brilliance, transparency, strong refractivity, intensity and homogeneity of color in colored stones. All these characteristics can be found in the Pietre Preziose collection, where the original stone material is interpreted with creativity to give life to endless variations expressing its splendor and magnificence. Quartzes, amethysts, jaspers and agates are worked to create unique decorations in the most important and exclusive interiors.