White gold is a mixture of pure yellow gold and other metals that make the resulting alloy harder and give it a white color Usually the additional metals that can be used in white gold are palladium silver nickel copper and zinc White gold ring with white diamonds
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The measurement for the purity of gold is karat An 18k gold for instance is composed of 75 gold and 25 other metals A gold that is certified 24k is pure gold without any additional metal However note that the higher the karat the less hardy the gold is and vice versa Chopard L U C Quattro in rose gold Photo Chopard
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White gold that contains a high percentage of nickel tends to be closest to a true white color It has a faint ivory tone but is much whiter than pure gold Nickel white gold often does not require plating with rhodium for color although the coating may be applied to reduce the incidence of skin reactions
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Rhodium comes from the same metal family as platinum It adds further strength and durability and importantly a really lustrous white surface sheenmaking it the ideal metal to coat and protect jewellery White gold coated in rhodium Image credit Wikimedia Commons
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Your dentist may choose a composite filling if the size of your cavity is small to medium or if your tooth gets a lot of chewing action These may also be a good choice for people who are afraid
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High karat white gold such as 18k white gold is soft and could be easily damaged in jewelry The rhodium adds hardness and durability makes all white gold a uniform color and protects the wearer from potentially problematic metals found in some white gold such as nickel
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A vacuum melted low expansion alloy used for manufacturing leadframes usually for ceramic packages such as the CerDIP It is composed of about 53 48 Fe 29 Ni 17 Co 0 2 Si 0 3 Mn and 0 02 C It melts at 1450 deg C and has a
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