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　　This sacred vase, whichappeared in the Arthurian legends of Chrétien de Troyes, was supposed to havecollected the blood of the five wounds of Christ during the crucifixion. The minerals that give it its color areVanadium, Chrome or Iron. It repels negative waves and badinfluences. In Chineseastrology, it is the gem associated with the Rat.Emerald belongs to the group of Silicates, and it is a variety of Beryl whosechemical formula is order to keep all its shine, the emerald can be regularly oiled with a specialproduct. Their contact hasresulted in different chemical reactions and the migration of certain minerals,according to a process called metasomatosis.The emerald is the Folding Gazebos Suppliers birthstone of the native people of May. So there is no evidence of purity foremerald, as it is used for diamond. The Colombian deposits,on the other hand, are more recent: they developed in geodes between 32 and 65million years ago, and the proportion of pure and flawless crystals is muchgreater. In Western astrology, it is traditionally associated with the signs ofCancer, Fish and Taurus. Better not to perform steam or ultrasonic cleaning, however, a simplewash is possible. It has a hardness of 7.The larger the table, the brighter the stone will be.The higher the color of an emerald, the higher the value.9. The inclusionscalled quot;frostquot;, frequent inside this stone, constitute the quot;gardenquot; of the emeraldand do not detract from its quality as long as they are not too numerous: they areon the contrary a pledge of authenticity.In his quot;Natural Historyquot;, Pliny the Elder praises the emerald as having the mostbeautiful green color ever, so much so that nothing seems greener after we havecontemplated this gem. It increases wisdom andpatience.5 to 8 on the Mohs scale, a density of 2. To speak of emerald green, one can usethe little-known adjective of smaragdin!Emeralds are very rare gems because their formation has required very specificgeological conditions, of several natures and at times very distant from eachother. The crystals formed at that time,bordering the contact zone, about two billion years ago.Some finally pull towards yellow or gray. Thus, in the Carnaiba (Brazil) deposits, a granitic magma bubble rising fromthe depths came into contact with the more superficial rocks. These ancient Egyptian mines are known as the quot;Cleopatra Minesquot;because the Queen has worked to consolidate her kingdom and keep control ofher mining operations. It symbolizes 40 yearsof marriage.According to its origin, the emerald declines all the shades of green, from theintense color of Colombian gems to the generally paler tones of Brazilian stones, through the blue-green, typical of Russian or African emeralds, and fir green. If youchoose an emerald from the Muzo mine in Colombia, ask for a certificate: in fact,this mine does not produce more than fifty jewelry emeralds per week. Worn near the fourth # chakra, that of the heart, it would soothe theemotions. This gem is brittle, so avoid shocks.