A sample of any precious metal indicates its percentage content in 1000 grams of alloy. Natural silver is characterized by high softness and therefore impurities are added to the material from which various kinds of products are made. Silver is presented in the following samples: 999 – pure metal; 960 – the highest marking; 925 – the most common, jewelry is…

Silver ranks second in popularity after gold. Varieties of silver jewelry It is suitable for both men and women and can serve not only as a frame for jewelry, but also act as an independent decoration. In addition, the most affordable price is set for silverware.

In Europe, the branding of jewelry began in the 13th century, and the first Russian brands appeared only in the 17th century. The need for control the quality of precious alloys arose due to the fact that gold and silver products were potential raw materials for coins, and the extraction of these metals in the country was very small, so silver and gold were…

As a basis for painting, the use of canvas has been known since ancient times. For example, Pliny testifies that the portrait of Nero, painted by one of the artists of that time (I century AD) by order of Nero himself, was executed on canvas, and not on wood, as was customary at that time, and the length of this painting was 40 m. One of the Fayum portraits…