The first thing a person probably pays attention to when gets to see a mineral is its color. It also plays a major role in defining the stone’s value. But what if the stone is able to change its appearance and may change from emerald to ruby right in front of your own eyes? As a matter of fact, a mineral in possession of such a rare feature was considered an asset of the premium quality in the Soviet Union. Throughout the whole period of existence of the USSR, there was not a single natural sample sold. Discovery of each mineral was also monitored closely. Moreover, even now many Russians are not aware that their grandmothers’ jewels, kept as family relics, are nothing but the finely crafted by the Government fakes.