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To determine the gold content in a particular piece of jewelry, the so-called sample system is used.

The world of jewelry is larger and more serious than the banal shine of precious stones and the alluring glow of gold

Jeweler courses stand out for their variety of areas. There are narrowly focused courses that teach only how to work with

Post updated: Sep 23, 2020 Grandmothers often admonish not to combine gold and silver together

Few materials have as many different uses as marble. This stone has a number of useful

Everyone knows that diamond is the most precious stone on earth. It is unique in that

Gold Atomic number 79 Appearance of the element Soft malleable yellow metal Properties of the atom

Category Carbonates (minerals) Name in English. Calcite Formula CaCO3 Group Carbonate Group Color White,

Greetings to all pearl lovers! Let's talk today about record holders who are famous throughout the world and dear

“Stone man,” they say about people with a difficult character. The phrase is mysterious and multifaceted. Also