January 12, 2021 In the process of producing nickel and copper as a result of processing anode sludge
What is a mole? Before we talk about how to find the molar mass of a substance, let’s define
May 18, 2021 How to distinguish gilded silver from gold is not an idle question, because
A ring with a black stone has always looked luxurious and elegant. The shine of the frame harmonizes perfectly with
Description of fire agate Fire agate is a magical stone. A stone of this color has a layered structure.
The territory of the Russian Federation boasts huge deposits of gold. The history of precious metal mining goes back 200 years.
Nature is the best creator and designer. She forms her masterpieces over thousands of years, patiently polishing her skills.
Post updated: Nov 19, 2015 In any area of trade, you need a standard - a guideline that
Description The scaly stone lepidolite has not been considered a mineral by the International Mineralogical Association since 1989. On
These precious stones excite admiration not even for their value, but for the beauty of their form and purity.
