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As the gold spread in many places of the globe, in addition to free and quality in nature, and the excessive price, and use money in various corner knowledge of the world became easier to know other metals. The natural qualities had made him known Vkther minerals commonly mentioned in the books and many miners engaged by him. In the fourth century AH / X AD, hitting Islamic civilization to a climax and decorated the palaces Righteous various types gems and minerals brought from various parts of the Islamic State vast, like many of the chemical purification methods such minerals. Peronist stated in writing Aljmaher to know purification methods gold jewellery which is not much different from the methods used today. Peronist recalled in gold mining and cleared the text: "Some of the gold Itsfi fire solution either alone or distortion known offers, and called for good chosen because it captures the slightest of metal called Rkaza sector and focus metal if it blocks both metal silver, gold, and perhaps not free of what Schopp, Fajlsth liquidation until characterized decorated with pure gold for the synthesis, and then prove the weight. " Peronist comes to explain purification gold when mixed with soil or in the large stones, and describes the method used to extract gold, which like the earth and stone and accurate description not much different than it is now. He says: "Perhaps the gold united stone there Mspock Vahtej him to be accurate, and the mills Tzhgah only correct and accurate Balmchajn reported in recite even said to be aggravated red, in that it is ratified surprised Ajeeb, Almchajn stones are stretched on poles Passport installed water current drive , As in Samarkand in cannabis may Alkuagd, and if owners essence of gold, Antahn, cuttings from Hjarth and all gold mercury, and then in the afternoon until the skin pieces come from the amount of mercury, which flies what remains of it is called fire and Mzbaka Zebkie gold and gold which stood at the end that very behind draw, as happened to me a few times disfigured, does not affect the substantial impact of the test barely related, and almost never rigidity out of football, taking in stalemate when spare Borders, most likely in gold Alospr that for the soft. " The Peronist touch to the way the ancient Indians used in catching gold by mercury, and this explains how accurate explanation successful and says: "water authority Elmar the township Ihnd Alguendhar when India Gold River, and even that they are not one hundred credit for this reason and called on the principles Mnabah Hydrocephalus, and then if an assembly called Kersh any Black Sisters, and the intensity of Khaddrth depth, and if the office concluded Align selling Shamil spot in the Kashmir nominated Powell called on the water authority there ... In Mnabah places where digging Hverat, and the decision of the water which is above the Imlaunha Mercury until it turns Hol then reproduced has become Zebgaha gold. this because that water in principle to run a sharp sand with gold, Kajnha mosquitoes paper and smaller, and passes on the mercury adds gold and left the sand goes. " Then finds gold from the manner in which mercury Peronist mentioned previously