In the Developed World, gold to be used for body jewelry is usually mixed with another precious metal to give it its colour. Western gold is therefore usually an alloy.
This is not true of Asian gold which is usually sold at 24 carat or 100% pure. In contrast, most Western jewelry gold is 9 or 14 carat, which is 37.5% and 57.75% pure respectively.
White gold is often confused with silver, which is not strange as white gold is normally an alloy of gold and silver or gold and palladium. These ‘white’ metals tone down the natural yellow colour of gold without decreasing the value of a ‘cheap’ ring any more.
Nickel and platinum can also be used as the other metal to be blended with the gold to create the same colour. It is virtually impossible to tell with the unskilled eye which white metal has been used.
However, as the white metal can be in a higher proportion to the gold it is worth finding out, since platinum and palladium will enhance the value of the ring whilst silver and then nickel are not worth as much.
Some alloys have rather special uses. For instance, gold mixed with nickel produces a very hard alloy and is more suitable for pins used in bone surgery, whereas gold mixed with platinum produces a softer alloy which is suitable for creating a mounting for a gemstone.
Some metals produce an allergy in a comparatively small percentage of people, which is another reason for finding out what your body jewelry is made of. Nickel produces skin reactions more than the others and you do not want to become allergic to your wedding ring, do you?
Platinum is a very hard metal in comparison with silver and gold, which makes it perfect for use in a wedding ring which tends to be worn all day, even at work. Platinum is more resistant to scratching than silver or gold or a silver-gold white gold alloy.
Platinum is also very popular for use in body piercing, but it is quite costly when compared to gold and silver. However, platinum is the best alternative, if you want to wear an expensive white metal ring or other article of jewelry.
The fact is that the alloys called white gold were created as cheaper choices to platinum. The white gold alloys are completely man-manufactured and do not occur in nature. White gold is also measured in carats, but it can only go up to 21 carat. Pure gold is 24 carat.
The measurement known as the ‘carat’ is slowly being superseded as a definition of the purity of gold. The carat is a Fifteenth Century archaic measurement, but jewelers are moving over to ‘parts per thousand’ of precious metal – millesimal fineness. Under the new system 18 carat, 75% gold would be described as 750/1000 pure gold.
Before going to purchase gold, it is best to get acquainted with these three systems of measurement and it is prudent to know whether you are allergic to some precious metals and if so which ones.
Owen Jones, the writer of this piece, writes on a number of subjects, and is now concerned with baby birthstones. If you would like to know more, please visit our website at Jewellry and Watches.