Semi-precious
Origin of green gold Green gold became known several thousand years ago. For example, ancient
Category Oxides (minerals) Name in English. Rutile Formula TiO2 Group Oxide Group Color Red, Brown
Zirconium Atomic number 40 Appearance of the element Properties of the atom Atomic mass (molar mass)
From December 20 to 23, the Trubetskoy-Naryshkin mansion will host a grandiose jewelry exhibition “Treasures of St. Petersburg.”
Translated from French, “crackle” means “venous network.” This name accurately describes the stone, which
Botswana agate is considered one of the most attractive stones. It has a fairly high price, but
DESCRIPTION AND PROPERTIES OF MALACHITE STONE WITH PHOTO Malachite is a stone whose properties make it
Hypersthene is a rock-forming stone and represents a group of silicates. This is a fairly rare mineral. Its color
The choice of gold and silver is never based on which metal is harder and more durable.
Gold jewelry is expensive, so not everyone can afford it. The solution to the problem is gilded silver.
