Nephrite deposit, Chelyabinsc region, Russia. License until 2036 + The license for the export from Russia. Reserves of 35,000.00 tonnes. Jewelry min. 30%. Price 186,000,000.00 rubles.
Name: Polished sample of dark-green nephrite.
Mineralogical description: Nephrite from Miass is a dense cryptocrustalline ( diverse columnar ) variety of monoclinous amphiboles of mineralogical row of tremolite – actinolite. Chemical composition: Ca2(Mg,Fe)5[Si4011]2(OH)2. According to GOST ( All – Union State Standard in Russia ), nephrite from the given deposit belongs to the 1st sort.
Gemological characteristics: Colour: Dark – green with tints of silver gray, with distinct black inclusions of sulphide minerals. Transparency: non-transparent, translucent in thin shears. Toughness: 6,0. Relative density: 2,95. Refraction index: 1,600 – 1,625. Slight pleochroism in yellow-green tonality.
Deposit: “Miasskoe 1”, situated near Miass city, Chelyabinsc region, Russia. Pay horizon intertongues with deeply metamorphized beds of serpentinites, ledge is originated as a result of hydrothermal metasomatism of serpentinites.
Radioecological research: according to the radiation safety, jadeite from this deposit, belongs to the 1st class of minerals ( effective massic activity of the natural radionuclids doesn’t ehceed 740 bk/kg ), and is safe for usage inside the living premises and for souvenirs making.
Ehpert –gemologist. Dzhumaev O.R.