Jewelry culture
Alloys: what is their function?
Gold: why is it a precious metal?
Cut, Color, Clarity and Carat.
Palladium is one of the most precious metals, along with Rhodium, Platinum and Gold.
How to recognize gold using acids?
Recognizing gold using acids
Platinum is a rare, precious metal, like gold and silver, non-magnetic, pure, good conductor of heat and electricity.
A precious metal is a chemical element metallic rare and of great economic value.
A chakra corresponds to a main nerve center in the body.