It is a precious, soft metal and of yellow color. His pure condition can be in the shape of petitas.
A golden ounce is equivalent to 31,10 grams.
The pure gold is of 24 kts, is too soft and hardens mixing it with silver or copper.
In thin jeweler’s shop there is in use of 18 ktes that has a purity of 750mm and there is applied to him a mixture of 30 % more or less.