Emerald Gemstone


Emerald is a precious gemstone and a variety of the beryl as colored green due to trace amounts of chromium and sometimes vanadium. Itl has a hardness of 7.5–8 on the Mohs scale. They are poor in toughness. They are like all other colored gemstones, are graded using four basic parameters–the four Cs of connoisseurship: color, clarity, cut and carat weight. Color Normally, in the grading of colored gemstones, color is by far the most important criterion. In gemology parlance color is divided into three components: hue, saturation, and tone. Emeralds occur in hues ranging from yellow-green to blue-green, with the primary hue necessarily being green. Yellow and blue are the normal secondary hues found in emeralds. Emeralds tend to have numerous inclusions and surface breaking fissures. emeralds are generally graded by eye. Thus, if an emerald has no visible inclusions to the eye (assuming normal visual acuity) it is considered flawless.
Colombia is by far the world's largest producer of emeralds, constituting 50–95% of the world The three main emerald mining areas in Colombia are Muzo, Coscuez, and Chivor.Rare "trapiche" emeralds are found in Colombia, distinguished by ray-like spokes of dark impurities. Zambia is the world's second biggest producer, with its Kafubu River area deposits as such Emeralds are found all over the world in countries such as Afghanistan, Australia, Austria, Brazil,[Canada, China, Egypt, India, Madagascar, etc. to name a few.

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