Purple gold, blue gold, green gold, black gold!
" ... The most popular and most often referred to is white gold jewelry, which was first brought into vogue in the 1920's. White gold is made by adding "white" metals to gold, such as platinum, silver, zinc and nickel. White gold jewelry made with platinum can be more expensive then pure gold jewelry because platinum is currently worth more than gold.
The second most common variation on 24 karat gold jewelry is rose gold or red gold jewelry. Rose gold is created in varying hues by adding copper to gold. ...
... How are coloured golds made?
According to KaiJewels.com, making coloured golds is possible by formation of special gold metal compounds (Intermetallic Compounds) or by forming a surface coating on gold (Patination Of Gold).
Alloying gold and aluminium makes purple gold. Purple gold is often used to highlight white gold jewelry. View examples of purple gold jewelry.
Blue Gold is made by the interaction of gold and indium with manufacturing techniques being similar to those used to make purple gold.
Black Gold can be created using quite a few techniques using black rhodium or ruthenium, amorphouse carbon, and oxidation of carat gold containing chromium or cobalt. Read more about the techniques used to create coloured gold jewelry.
According to 24carat.co.uk, Green gold is made by combining gold and silver with no copper in the alloy mix producing a greenish yellow. Most green golds are very soft and generally used only as small amounts to highlight other gold colours. ... "
http://goldprice.org/gold-jewelry/2006/ ... black.html
http://www.purplegold.com/
gingerkid wrote:green gold has cadmium in it. i googled it and i think there's 4% of it mixed with other alloys to produce green gold.
PabloMajid wrote:Purple gold, sometimes called violet gold, is an alloy of the pure metal and aluminum. It is frail and because of this it can shatter easily. Jewelers usually use it as a gem. The blue version is also a mixture of gold and indium.
