Types of stones

We have known about the chicken god stone since childhood. As children we collected such stones

Category Oxides Name in English. Ruby Formula Al2O3 Group Corundum Group Color Red, Red-brown,

Color Black, dark brown Hardness on the Mohs scale 2.5 - 3.5 Density g/cm3 1.3 -1.4

History Linguists believe that the name comes from the word “layer”. The history of the mineral is connected with Russia:

How wonderfully precious opal plays! It has the shine of the sun and the ebb of the moon. In him

What does the stone look like? For a mineralogist, cacholong is a type of ordinary base opal with quartz

What is this chemical element? Zirconium is part of zircon. Some mineralogists believe that their

According to Colored Stone magazine, the popularity of topaz has grown so much that today the stone is “coming

Red jasper is a semi-precious decorative stone. It is used to make jewelry, souvenirs,

Marcasite is a stone that is a sulfur compound. It belongs to the subtype of pyrites. But