Types of stones

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Description and chemical, physical properties: The ring needs your care Silver is a noble metal,

Throughout its history, humanity has given a special place to such a precious metal as gold. First

The purity of silver, as well as the cost of products made from it, is determined by the ratio of the precious metal to the impurities contained

Sapphire is a precious stone that can conquer any woman. Its elegance impressed not only connoisseurs

Natural aquamarine: Depositphotos It is called the sea frozen in stone, and ancient legend says that

Category Oxides (minerals) Name in English. Quartz Formula SiO2 Group Group of glass-forming oxides Color White,

The lack of awareness of the average person in the precious metals quotation system leaves room for scammers and unscrupulous sellers to

The stone of seafarers, capable of calming the storm; “Siberian heavyweight”, “imperial stone” - all this is about him,