What are grey gold alloys?

Where can I find manganese , and is manganese dioxide the same thing / correct alloy ? Thanks!

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There is certainly a difference between gray gold and white gold. White gold is a mixture of pure yellow gold with either palladium or nickel. Grey gold is a mixture of yellow gold with silver, copper and manganese. The effect is sort of similar, but not exactly. Grey gold is a little more matte that white gold, which is really light and shiny looking. Grey gold jewelry is not very common.

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Grey gold are usually 18k gold jewelry items. Grey gold also consists 1-10% silver, 7-15% manganese and 3-15% copper.

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Grey gold is made by adding silver, manganese and copper in specific proportion to gold.

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