Gold refining is a process of purifying the precious metal from impurities, carried out as in industrial
Since ancient times, people have used precious minerals to make jewelry. First, using description and observation methods
Talismans, amulets and amulets made of stones began to be created in ancient times. People believed
History and origin Zircon is considered one of the most ancient minerals. This is confirmed by a unique find
History of invention Cubic zirconia is an analogue of diamond. This is an artificial duplicate. That is, it means
Category Oxides (minerals) Name in English. Agate Formula SiO2 Group Mineral, silica Color White,
What is this? Dedicating an article to this extraordinary stone, it should immediately be noted that in the title Baroque
Author: Dimon February 11, 2021 1:31 pm Community: Facts Tags: jewelry interesting stones
Interesting information about rock crystal. There are a large number of semi-precious stones in nature, but perhaps
Limestone is a rock formed by the deposition of carbonate material and subsequent alteration under
