Gold purity are measured in carat which are likely 24k, 22k and 18k. Carat is basically a term which stands to check the purity of gold, the higher carat indicate the more purity of gold. Let’s understand the characteristic of 24k, 22k and 18k in details.
24 Carat Gold
If the gold is 24 carat it is considered almost 100 (99.99) percent pure gold. It is without mixing of any other metal as alloy in gold and it is 99.9 percent pure gold. It is important for you to understand that there is not higher than 24 carat gold in the market before you go to any dealer to buy gold and they make you fool by telling that they are selling 25 carat gold.
24 carat gold is the purest form of gold so it is more expensive than 22 carat and 18 carat gold. Nonetheless, 24k gold is low density so it is not good for making jewellery compare to other carat of gold but the gold bars and coins are bought in purity of 24k gold. 24 carat gold are mostly used in high end electronics and medical devices for example medical equipment which is used in curing children from ear infections etc.
22 Carat Gold
22 carat gold is considered 91.67 percent pure gold. 22ct gold is used to make jewellery because of mixing of some other metals makes jewellery stronger. 22ct gold most commonly used in jewellery making purpose. Metals which are mixed in 22ct carat are silver, nickel, zinc and some other alloys. It is only possible to make the jewellery durable by the addition of these metals. However, 22ct gold is not considered for diamonds and heavy jewellery.
18 Carat Gold
18ct gold is 75 percent gold with addition of 25 percent of other metals like silver and copper etc. Nonetheless, 18ct gold used to make the diamond and other speckled jewellery. The 18 carat gold price is comparably less than 24 carat and 22 carat gold. It is simple to recognize the 18ct gold because it comes with stamped 18k, 18kt and marketed by 750, 0.75 and similar type of stamp which make easy to recognize 18 carat gold which contains 75 percent gold.
Based on which gold fineness calculated
Carat is communicated as fineness in west countries which means 24ct considered as 1000 parts out of 1000 pure or fineness. 22ct communicated as 22 divided by 24, multiple by 1000 which gives 0.9166 of fineness. 21 carat is 21 divided by 24 and multiply by 1000 which gives 0.875 and it is similar for 18ct and which gives 0.750 fineness.
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Assorted Colours of Gold
24 carat gold color is natural warm and the color of 24ct gold can’t be changed without changing the gold purity from 24ct to lower carat like 22ct and 18ct gold. Gold color can be changed by changing the composition of the alloy while making the jewellery. Few of the common gold color are as mention below.
Rose and Pink Gold – This kind of gold color comes or formed when more copper compassion used in alloy gold.
Green Gold – Adding silver and zinc are results in green colour of gold.
White Gold – By adding more palladium and nickel compassion in alloy results in white gold
The Final Word!
24 carat gold contains 24 parts of pure gold whereas 22 carat gold contains 22 parts of gold and it is mixed with 2 parts other metal. Similarly 18ct gold contains 18 parts of pure gold and mixed with 6 parts of other metals. 24ct is 99.5 percent pure gold and above, 22ct gold is 91.7 percent pure gold, 18ct gold is 75.0 percent of pure gold.