Native gold contains usually eight to ten percent silver, but often much more alloys with a silver content over 20% are called electrum. Although gold is a noble metal, it forms many and diverse compounds.

High-carat white gold alloys are far more resistant to corrosion than are either pure silver or sterling silver. Gold jewelry is usually sold at 18 karats, but 9 and 14 karat gold jewelry is also very popular.

Gold may have been the first metal used by humans and was valued for ornamentation and rituals. Gold is also mentioned several times in the Old Testament, and is included with the gifts of the magi in the first chapters of Matthew New Testament. The south-east corner of the Black Sea was famed for its gold. Gold has been associated with the extremities of utmost evil and great sanctity throughout history.

Medieval kings were inaugurated under the signs of sacred oil and a golden crown, the latter symbolizing the eternal shining light of heaven and thus a Christian king's divinely inspired authority.

The price of gold is determined on the open market, but a procedure known as the Gold Fixing in London, originating in September 1919, provides a daily benchmark figure to the industry. In various countries, gold is used as a standard for monetary exchange, in coinage and in jewelry. Although this is certainly not a professional way of examining gold, the bite test should score the gold because gold is considered a soft metal according to the Mohs' scale of mineral hardness. The purer the gold the easier it should be to mark it.

Yellow gold is not the only gold jewelry available, gold jewelry can come in a variety of colors depending on various factors, which make up its composition. Although yellow gold remains popular one should consider purchasing a variety of color.

White gold is an alloy of gold and at least one white metal, such as silver or palladium. While some higher quality white gold alloys retain their shine and lustre, most will be coated with a very thin layer of rhodium. Like yellow gold, white gold is measured in karats. Rose gold is also known as pink gold and red gold. Since it is an alloy, there is no such thing as "pure rose gold"; pure gold is yellow and pure copper is reddish. 18 karat rose gold may be made of 25% copper and 75% gold. It is produced by various methods, such as electrodeposition using black rhodium or ruthenium; plasma assisted chemical vapour deposition process involving amorphous carbon; and controlled oxidation of carat gold containing chromium or cobalt.

Black gold is a type of gold used in jewelry. Unfortunately, black gold is very hard and making jewellery out if it usually necessitates using previously-made melting forms.

When buying Gold jewelry it is important to ensure that it is valuable. Like gemstones it is wise for a buyer to obtain proper certification so that there can be no doubt about its authenticity. A genuine jeweller will have no problems with providing you with such certification and some online retailers will provide certificates of authenticity automatically.

Summary Gold is a valuable metal used in jewelry. It is important for those who enjoy precious jewelry to know the qualities of gold and the different types of gold jewelry available.