When making gold jewellery, the gold is usually mixed with other metals like silver or copper which reduce the carat purity.
Reasons for doing this include changing the colour of the gold and to increase durability of the gold because adding other metals make the gold harder to wear.
The most common purity of gold jewellery in the UK is 9 carat. This means that there are 9 parts gold to 15 parts other metal.
If you divide 9 by 24 and multiply by 100, you will get 37.5. 37.5 is the percentage purity of 9ct gold. You may have even heard of the term parts per thousand (ppt). All hallmarked 9ct gold jewellery in the UK has a 375 stamp on it. It means that there are 375 parts gold per thousand.
Other carat purities are listed in the table below.
Carat – % Purity - PPT
9 – 37.5 % - 375
10 – 41.6 % – 416
14 - 58.3 % - 583
15 - 62.5 % - 625
18 – 75.0 % - 750
22 – 91.6 % - 916
24 - 99.9 % - 999
Falkos Jewellers purchase all types of gold from 9ct to pure gold bars. Whether the gold is hallmarked or not, we are able to test its carat purity in-house.
For gold items which are not hallmarked, but in a raw or industrial form, this may involve melting and assaying the gold to determine its purity.
Sell Scrap Gold to Falkos Jewellers
