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Metal Education

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INTRODUCTION

Precious
metals

have been the centrepiece for adornments throughout history. Silver and Gold have been admired as jewellery and décor. While Gold takes the spotlight, silver, platinum, palladium are quite popular as well. The history of Gold finds its link to money which in course of time was replaced by currency, as we know of today; the Gold Standard was fixed that determined the value of their currencies in terms of a specified amount of gold.

GOLD

The word ‘gold’ comes from the Old English word “geolu” which means yellow. From the very beginning gold attracted civilizations all over the world. It has been treasured as an object of desire and beauty. Due to its golden color it often played an important role in Mythology and is considered a prized possession till date.

GOLD FACTS

49% of the total gold mined is used in manufacture of jewellery, rest being used for industrial purposes. 187,200 tonnes of gold has already been mined and yet it is believed that 80% of the total gold in the world still remains unearthed.

Yellow is the most popular color in gold, even though gold is available in a diverse palette. The use of alloys with 24 karat gold makes it more durable, as gold’s malleability makes it very soft, this alloying practice is also used to change its color.

24 karat is pure malleable gold and is not used in jewellery. While 22 karat and 18 karat is most commonly used in India, 14 karat, 10 karat and even 9 karat is used in European and other countries.

Every price of jewellery is stamped with its purity, hallmarking logo, brand name and year of hallmarking, which enables the customer to exchange or sell the product later and also for the jeweller as it helps them recognize their manufacturing.

Hallmarking ensures that the product in question is manufactured in the exact karat weight that it claims to be made of. The alloys used commonly to change the caratage and color of gold are copper, nickel, silver, zinc, palladium and manganese.

SHADES OF GOLD

Differently colored gold is as pure and real as its yellow counterparts. Pure gold being too soft for jewellery is mixed with alloys to gives it the durability it requires. Each metal color lends its color turning its original color to various shades of white, pink, red, green and the like. Nickel and silver are used for white gold, while copper is used for pink and silver for green. The shades of yellow gold can also vary with the alloys used for its various karat weights. The figure shows the various color palettes of gold.

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