The discovery of metals to leave the great leap forward for human civilization. The first to be discovered were the native metals such as gold, silver and copper that occurs naturally in a pure form. "As each metal was discovered, the companies were transformed."
Silver occurs as ductile, twisted, branching masses of metal that native silver tarnish the gray and black, or silver sulfide as argentite. It is found most often combined with the sulfides of lead, copper and zinc (galena, sphalerite, and Calcopirita). In its native form, as usually occurs silver star-shaped or tree-like clusters, the dendrites and wire-like forms, or as compact masses. It is occasionally crystallizes as cubes or octahedra.
About Sterling Silver
Silver is very soft and is usually connected to make it stronger. The league best known is "Sterling Silver", which is 92.5 percent and 7.5 percent Silver Copper, and has long been valued for their ability to work and resistance to corrosion. It is also called "925 Sterling Silver." The main applications are for the coinage of silver, jewelry, medicine, chemistry, and photography. Because of its electrical and thermal conductivity, it is also important in electro-technology.
Nature Silver metallic Silver (Ag) has a hardness of 2.5 to 3 and a density of 9.6 to 12 (when pure). This is opaque, has a metallic sheen, and leaves a bright white striations. It has no cleavage and breaks with hackly fracture. Silver belongs to the system cubic crystal, but crystals are rare, forming as octahedrons or hexahedrons. Silver occurs most often as yarn, dendrites, or plates.
The different patterns Silver
Silver is the different standards. Fine Silver, Sterling Silver, Silver Britannia, Mexican Silver, Coin Silver, Silvers and German (not to be confused with nickel silver, which is also referred to by this term) are different patterns of silver used in Germany.
The largest producer of silver is the Mine Guanajuato, in Mexico, where he was extracted silver from 1500 AD. More than half of world reserves of silver are held in Mexico, U.S., Canada, Peru, Kazakhstan, and Russia.
The Roman Empire had a huge influence on the course of European art and culture. Lasting impressions of Roman architecture have survived right up to the present day, from the ruins of the Colosseum at the epicentre of Rome itself, to far western corners of Europe including the city of Bath in England, named after its Roman baths.
The origins of Rome are said to date back to 753 BC and the notorious twins Romulus and Remus. Sons of Mars and a Vestal Virgin, the two warring brothers conceived rival communities, forever at one anothers throats.
Eventually the hostilities came to a head and Romulus killed his brother Remus. Freed from his brother's shackles, Romulus endeavoured to dominate civilisation and the city of Rome was built.
Centuries later another great leader emerged to take the reins of the Roman Empire. General Julius Caesar had come through the army ranks and coveted the position of leader of the Empire.
Caesar had spent his time marching his armies across Europe, defeating his hosts along the way and expanding Rome's territorial domination of the continent. The defeat of France was a significant conquest and Caesar felt time was right to fulfil his destiny.
Having marched his army into Rome, Caesar declared himself Dictator for Life, commencing his reign over the largest empire the world has seen to this day. His rule came to an abrupt end in 44 BC following his assassination.
Several years passed before his adopted son Augustus stood forward and succeeded his father as leader. He declared himself emperor of Rome in 27 BC.
By the end of the 4th century the empire was in decline; the map of Europe was changing. One by one, Roman outpost settlements were defeated. Barbarians from beyond the Danube and the Rhine were attacking villages with an increasing amount of success. When the final emperor relinquished his post in 476 BC the Empire had fallen forever.
The fall of the Roman Empire has spawned many theories as to how the world's greatest power fell to its knees. One interesting theory suggests the extensive use of lead in their plumbing may have poisoned their drinking water to the extent of causing infertility.
Whatever the reason, the face of Europe changed forever, heralding the dawn of a new age.
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