Comments for antique hallmarked 900 gold wedding band

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900 on gold wedding ring
by: Toni

Hi - "900" is not a common gold standard mark. On rare occasions you may see something different. The odd ones can easily be calculated using following:


1 karat gold is 1 part in 24 gold.

So for instance 22ct or 22K is 22 parts in 24 of pure gold or 22/24ths or if you multiply 22/24 X 1000 you get 916 (916 parts per 1000) or 91.6% gold.

If you see a number, for example 625, divide it by 1000 and multiply by 24, it will give you the carat. 625 / 1000 x 24 = 15ct.

The carat does NOT change because of the colour. The amount of gold is the same. Gold comes in many colours depending on the other metals used in the alloy.

Cheers
Toni



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