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Types Of Precious Metals

 

GOLD

   Gold, like silver, platinum and other precious metals, is a natural chemical element, which means it cannot be manufactured.  Interesting features of gold are that it is an element remarkable for its rarity, density, softness, and it's very good electrical conductivity.  It is also largely inert, and therefore is almost totally immune to decay, and thus can be stored cheaply for long periods.

   Gold is a very dense metal with a density of 19.32 g/cm3 which gives it a very heavy atomic weight of 196.9665 g/atom.  It is so distinctively heavy that solid gold offers its own immediate qualitative verification in the hand.  Gold's heaviness is also important in that it means large amounts of gold can be stored in relatively small spaces.

        24 karat = 100% gold        Too soft for jewelry

        22 karat = 91.7% gold       Very soft — not recommended for jewelry

        18 karat = 75.0% gold       Recommended for fine jewelry

        14 karat = 58.5% gold       Recommended for jewelry

        12 karat = 50.0% gold       Not acceptable for jewelry

        10 karat = 41.7% gold       The legal karat limit considered as real gold in the United States

        Gold comes in different colors including:  Yellow, White, Pink, or Black. 

        

PLATINUM

   The rarest and most precious metal commonly found in jewelry is the white metal, platinum.  It is a relative newcomer to jewelry, having become popular in the past 200 years or so.  Like gold, it is rare and heavy, but it is more durable than gold and is sold in purer form. It is sometimes mixed with 5% or 10% of iridium and ruthenium to make it harder, which also belong to platinum family. Platinum is not sold according to karat weights. It is stamped PT or plat in the United States to indicate that it is platinum.

   Because it is considered hypoallergenic, platinum is excellent for people who are allergic to other metals. Its white color also makes it popular.  It makes diamonds really show of their brilliance and color.

PALLADIUM

   Palladium is a sister to platinum, a “noble metal” (member of the the platinum group of metals) with some rather unique properties that ensure a place for it in industry and as a precious metal investment.  This fascinating metal is tied closely with platinum from both history and its properties.  Even so, important differences remain in physical properties and in today’s supply and demand economics.

   Palladium is lighter than platinum having about the same density as silver, thus, palladium is a jewelry metal as well.  Palladium in jewelry is primarily used as an alloy with gold to create a whiter  look on the metal.  Palladium is also used as an alloy in producing white gold.

SILVER

   Although silver was found freely in nature, its occurrence was rare. Silver is the most chemically active of the noble metals, is harder than gold but softer than copper.  It ranks second in ductility and malleability to gold.  It is normally stable in pure air and water but tarnishes when exposed to ozone, hydrogen sulfide or sulfur. Due to its softness, pure silver was used for ornaments, jewelry and as a measure of wealth.  In a manner similar to gold, native silver can easily be formed.

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