Green Russian Jade Nephrite cabochon 45 x 18 x 5 mm.
Nephrite is a variety of the calcium and magnesium-rich amphibole mineral actinolite. Jade is a silicate of calcium, magnesium and iron. Its hardness on the Mohs scale of 6.0-6.5 units. Jade - a unique stone. More viscous and lasting ornamental stone in nature. On the strength of it is not inferior to steel. From a strong impact on the surface of jade can be formed fossa, but the stone itself will not break, it can only cut diamond.
Nephritis varies in color, which depends on the content of various impurities. The color range is diverse - from black to white. Back in the Bronze Age, jade was used by people to make durable and long-lasting working and hunting guns, weapons. To the world famous jade plate include the tomb of Tamerlane, six-meter statue of Buddha in China, the sarcophagus of the Russian Tsar Alexander III and the Emperor of China printing. Jade deposits are found in many countries. Considered to be one of the best in the world and are of high quality raw material deposits in New Zealand. Large deposits are in Russia, China, USA, Canada, Brazil, Mexico, Poland. Ancient Chinese philosophers compared the properties of jade with the best spiritual qualities of man. Its hardness personified justice and moderation, soft luster - mercy, purity - wisdom, translucency was considered a symbol of honesty and variability - a symbol of courage. He was regarded as a symbol of power in China, immortality and perfection, and valued above silver and gold.