Oil shale Oil shale (HS) - pyrobituminous shale - sedimentary rocks of carbonate-clayey (marly), clayey
Vorobievite, amethyst-balsatin, morganite - the stone is the same, but there are many names. This precious one
Cubic zirconia – the word “cubic” refers to the symmetry of its crystals, and “zirconia” refers
Perhaps the most interesting, based on the variety of qualities, brands, characteristics and scope of application, is the alloy
Black semi-precious stones have always been objects of increased attention from people, because black color
Today, many people prefer to wear gold jewelry. One of the most popular and expensive
How jewelry production works in Russia: SUNLIGHT case March 23, 2021, 12:25 How
Caffa is an ear decoration, unusual and fashionable. The difference between these earrings is their fastening,
Gold, like silver and the six platinum group metals, belongs to the noble, or
Category Silicate minerals Name in English. Olivine Formula (Mg,Fe)2[SiO4] Group Island silicate group Color
