Production

05/16/201705/17/2017 Maria Ivanova 3 comments A gold chain is a classic piece of jewelry that remains the most desirable

December 14, 2019 A physical-chemical process is used to process scrap radio components with subsequent release of silver,

The metallurgical process of purifying precious metals from contaminants is called refining. This process is used when

September 17, 2019 Directions Victoria Samarskaya This article will be useful to those who are interested in where

First of all, these will be objects made of iron and cast iron. Water hides in its

Why does gold turn black (pure precious metal is too soft to make jewelry from).

Typically, powerful magnets are designed to find precious metals. The search magnet reacts to gold and

Refining is the purification of metal from impurities. This process consists of a series of sequential separation processes

Refining of precious metals is carried out both in industry and by amateurs at home. Target

Sooner or later, the time comes when darkened and tarnished gold jewelry ceases to please