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October 29, 2018 Production Ekaterina Ryzhkova What is chalk made of? What kind of connection is this

Post updated: July 19, 2020 Numismatists have their own definitions of the value of certain coins.

Hello dear readers. As you know, diamond, despite its bewitching appearance, is

Hello, our dear readers! Have you ever wondered, diamond and graphite - what could be

Metal oxidation Rhodium plating Silver plating with ruthenium Use Product care Several thousand years ago

We are all already accustomed to gold jewelry that people wear everywhere. However, one of

Stones have always had magical properties; love rituals were performed on certain types, or vice versa, lapel rituals

Amber is particularly popular in the jewelry market. This bright sunny stone has long been

What is Rhodium? It is a noble metal, a platinoid. 45th element of the Mendeleev periodic table.

It is not gold or platinum that are the most expensive metals from D.I. Mendeleev’s table, but