Pure gold, also called, depending on the cultures, trades and eras, fine gold, or 24-carat gold, refers to the chemical symbol metal Au in its pure state, that is to say when it does not form an alloy with other metals.
Fine gold thus designates, by definition,Gold rate in Canada that would not have been combined with any other metal: nevertheless, in official terminology, or at least in the meaning retained by the federal banks and goldsmiths, it refers to 99.5% refined gold, which is significantly different from the definition of purity.
Purity is here a relative datum, which does not designate a physical reality. These different names, however, all refer to an absolute purity that only the titration thousandth refutes.
Carat VS thousandth
Indeed, while it can be said of an ingot that it is made of 24-carat gold, it will never be said that its title is 1000/1000, but for example 999/1000 (or 999 thousandths). And this is quite a big difference: because if you use the carat to evaluate the mass of gold contained in the ingot, it is said that this ingot is pure gold. Whereas if we use the thousandth, we say that only 999 parts of this same ingot are fine Gold rate in Canada and that part is another metal.
If, on the face of it, this small distinction seems to change little in the value of an ingot, it is of colossal importance for a Federal Reserve, a bank, or a trader who buys or resells large volumes of ingots. Because if one thousandth of each ingot is not gold, we discover with this measuring system that all the thousand ingots, an ingot disappears. Or, to take another image, we discover that for 1000 ingots in real gold, a lead ingot, or some other material, slipped into the lot.
And these are not vain images: it must be known that the minimum purity for an ingot, must be 99.5%. This is also the minimum purity for bullion stored in federal reserves.
Pure gold does not exist
The inexistence of pure gold is therefore an objective reality. Today, however, the methods of purification of this precious metal have made it possible to attain degrees of purity which, although they are not really that of absolute purity, are nevertheless very similar.
The Wohlwill process, named after the German chemist Emil Wohlwill who invented it, is a process that refines gold to a record purity of 99.999%, or 999.99 / 1000. The gold obtained from this product is called “gold 5-9”. However, this process is difficult to implement, and has the disadvantage of being long and expensive, and of necessity a large amount of gold to be implemented.
The refining of ingots is thus most often due to another chemical process, called Miller process, which achieves a purity of 99.5%, which is the minimum required to produce a bullion of “good delivery”.
Use of 24 carat gold
24-carat gold has hardly ever been used in jewelery, and this is easily explained. Pure gold being malleable, jewels, pieces or objects that would have been manufactured without being combined with other metals would have very quickly deformed.
To date, the only jewelery made in 24-Gold rate in Canada is jewelery that was not meant to be worn in everyday life, but was part of a complex religious ritual in which the purity of the yellow metal played a major role. Thus, the jewels found in the tomb of a person of high rank in the Necropolis of Varna (in Bulgaria), were part of a funerary treasure destined to remain frozen in death.
The gold leaves produced today are also made in alloys: if purities of up to 980 thousandths can be obtained, the 20 thousandths of silver, copper or palladium used are used to give them a slightly higher strength, as well as different colors.
In the end, 24-carat gold is very little used in golds mithery or jewelery. It relates more to the storage of the precious metal ingot, which requires for practical reasons to be carried out in pure form, as its proper use.