As gemstone wholesalers we at www.gemrockauctions.com offer a wide range of Gemstones, loose gemstones and other high quality products, Including Emerald which is a variety of the mineral beryl, coloured green by trace amounts of chromium and sometimes vanadium. Columbia has been the most important source of finest grade emeralds. It is a highly sought-after precious Gem, the most famous and favoured green stone, which for centuries has been widely used in the creation and encrustation of jewellery and everyday items. In combination of its colour, together with the durability and rarity makes it one of the most valuable gemstones. Emerald is the birthstone for May. Emeralds have one of the longest histories of all gemstones, since the time of Cleopatra and ancient Egyptian pharaohs. Dating back 1500 BC where ancient mining tools have been discovered at the entrance of emerald mines. Emeralds have set the standard for the ultimate colour in green gemstones. - Their Chemical Composition number is Si03 and its hardness ratio is between 6 to 8. When purchasing an emerald, colour is the most important factor. An optimum choice would be a consistent rich, luminescent velvety green colour throughout the stone. As emeralds gemstones are both rare and valuable, it gives opportunity for development of synthetics. There are many fakes and synthetics, therefore any important purchase of emerald is recommended to have a gemological certificate for authenticity, retrieved from a reputable gemological laboratory. The owners of www.gemrockauctions.com have their own factory and source their rocks and gemstones directly from miners or as close as possible in order to receive the right price, our factory can offer high discounts on sales we have 16 staff who cut gemstones full time and produce high quality products - we don’t cut artificial gemstones.***For any investors, collectors or lovers of this gem, it is recommended to have a gemological identification certificate for authenticity. It is an independent report from an approved gemology laboratory, issued by an independent gemologist.***