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Alloy is a mixture containing two or more metallic elements or metallic and
nonmetallic elements usually fused together or dissolving into each other when
molten. For example, brass is an alloy of zinc and copper. Metals easily form
alloys with other metals. The presence of even a small amount of another
element in a metal severely affects its properties.



















1.        Gold, discovered in approx. 6000 BC


2.        Copper, discovered in approx. 4200 BC


3.        Silver, discovered in approx. 4000 BC


4.        Lead, discovered in approx. 3500 BC


5.        Tin, discovered in approx. 1750 BC


6.        Iron, smelted, discovered in approx. 1500 BC


7.        Mercury, discovered in approx. 750 BC
Iron Ore
Copper Ore
Gold Ore
Tin Ore
Lead Ore
Mercury Ore
Silver Ore
GOLD EDUCATION
SILVER EDUCATION
PLATINUM EDUCATION
The other seven metals, known as the Metals of Antiquity, were the metals
upon which civilization was based. These seven metals were:
Metals are as old as human civilization and their history can be traced back to
6000 BC. Currently there are 86 known metals but before the 19th century only
24 of these metals had been discovered and, of these 24 metals, 12 were
discovered in the 18th century. Therefore, from the discovery of the first metals,
such as gold and copper, until the end of the 17th century, some 7700 years,
and only 12 metals were known. Four of these metals, arsenic, antimony, zinc
and bismuth, were discovered in the thirteenth and fourteenth centuries, while
platinum was discovered in the 16th century.
These metals were known to the Mesopotamians, Egyptians, Greeks and the
Romans. Out of these seven ancient metals, five can be found in their native
states. These five metals are gold, silver, copper, iron (from meteors) and
mercury.
Historically, precious metals were widely used in making jewelry, ornaments,
idols, temples, currencies, and war equipments, but are now regarded mainly
as jewelry, investment and industrial commodities. The following three metals
are widely traded and considered as precious metals due to their rarity and
beauty.
A precious metal is a metal with rare metallic chemical element and due to
that, high economic value.  Precious metals are less reactive than most
elements, have high luster, and have higher melting points than other metals.
Metal is a solid mineral that usually has a shiny surface and generally a good
conductor of heat and electricity, and can be melted or fused, hammered into
thin sheets, or drawn into wires.  Many metals are quite hard, with high
physical strength.  When polished, metals tend to be good reflectors of light.  
Common metals include bronze, copper, and iron whereas metals used for
making jewelry, such as gold, platinum, and silver are known as 'Precious
Metals'.
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