Emerald mineral name called Beryl

Briefly the origin of beryl jewelry supplierEmerald Beryl mineral name called, as containing traces of chromium mineral elements, showing a brilliant beauty of the green crystal. Beryl often into the shape of hexagonal columns, crystal output. Hardness of 7.5 to 8, the proportion of from 2.67 to 2.78, refractive index, gemstone wholesaler from 1.56 to 1.60, transparent, brittle.The chemical composition of emerald is Be3Al2Si6O18, also contains chromium, vanadium, nickel and other trace elements. Emerald green is mainly caused by chromium element, transition element is chromium ion (Cr3 +) in the crystal field splitting effects caused. Deep emerald green of a chromium oxide content of 0.5 O.6%, some of emerald light 0.15-0.2% chromium oxide content. Emerald hexagonal crystal system, long column. ~ Translucent and transparent. Glass optical translation, hardness 7.5 to 8, toughness is low, only 5.5, brittle, the proportion of 2.67-2.78, which is the crystal content of chromium and other elements related to the deeper the color the greater the proportion of green weight up to 2.78. Emerald is a negative crystal axis, a refractive index 1.602 at 1.564 between the red fluorescence under, mostly under the green color filter, the Colombian emerald pink, gemstone suppliers emerald color mainly on chromium content. However, it depends on the transparency of iron oxide content, the more transparent with less iron, more than 0.6%, the green will darken. As the emerald is the gas into the formation of hydrothermal environments, so the crystal inclusions containing many. Common are the black carbon particles, pyrite, biotite and albite inclusions, there are actinolite, calcite, tourmaline, apatite and rutile, etc., Guer very clean emerald rare . Common emerald available on the market the first terror, many are cloudy, and the inclusion and cotton stripes, some flaws still very obvious. People know that the king of diamonds, precious stones, it should be with the most precious gem, in fact, not entirely, one with the diamond the same size and quality are better than the price of diamonds, emeralds 3 to 4 times higher. Therefore, the general market, high-quality green emeralds are rare, usually mostly 0.2-0.3 carats of fine emerald, 0.5-carat emerald price is high the quality. Greater than 2 carats of high-quality emeralds are very rare, their prices are shockingly high. But nature has also discovered many large emerald crystals, so far the largest number of emeralds found in South Africa should be a crystal weighing 24,000 karats of precious stones. Emerald prices are very high, its own brittle, not anti-bump, so precious stone setting fees too expensive, gemstone wholesale and some needed insurance when embedded. The main origin of emerald are Colombia, the Urals, Brazil, India, South Africa, Zimbabwe and so on.