Kidney stones are smaller than the head of a pin. Almost invisible to the naked eye. But this hurts
Registration for special registration with the Assay Office The responsibility of the state Assay Office is to control turnover
Any piece of jewelry fades over time, loses its original shine and becomes no longer
Post updated: May 26, 2020 There is no such person who, in his entire life,
Group of organic stones Geologists, collectors and jewelers evaluate and systematize stones in different ways. For jewelers
Quartz is one of the most common minerals. About 70% of the earth's crust consists of
A wedding ring is a symbol of love and fidelity that young people exchange when registering a marriage. In
Pearls are perhaps one of the most famous natural stones. It was valued in many cultures
The “Skystone” turquoise is experiencing a surge in popularity today, last seen in the 1970s. Lots of designers
Kaolin in paints and varnishes Review of publication materials. Compiled by Yu. K. Pirogov Kaolin - everyday
