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
Good afternoon We know a lot about the American gold rush - unorganized mining of the precious metal
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,
Where to find and obtain radio components containing precious metals Dear Internet users! Send your photos
Marcasite is a stone that is a sulfur compound. It belongs to the subtype of pyrites. But
