# Find The Value Of I In The Formula I Prt How To Read Jewelry Marks

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## How To Read Jewelry Marks

Numerical markings on precious gold jewelry are a bit confusing to many people. We are usually used to seeing this type of karat or silver mark: 10K, 14K, 18K, Sterling, etc. The numbers have the same meaning.

The number for 14k is technically 583 but many manufacturers follow the European way and make 14k gold smaller than 14k, so most 14k jewelry is marked 585. 750 marked on 18K. If the mark is valid and there is also a maker’s mark on the jewelry, the number means these items are 18k gold.

Here’s where the numbers come in. Pure gold is called 24 carat. For 18K gold, there are 18 parts of pure gold mixed with other metals to make the metal suitable for use in jewelry. 24k is too soft to stand alone or hold the stone well. 18 parts pure gold 24, or 18/24 equals 750. This number comes from The jewelry contains 75% pure gold, 750 parts gold and 250 parts other metals among the “1000” parts. It’s easy to think of it as the percentage of pure gold in the recipe.

Sterling silver is 925 hallmarked. Sterling is 92.5% pure silver and the rest is another metal, usually copper.

What does it mean if a ring is marked 14K PR? 14K simply means it is 14K (karat) gold and K means it was made in Southeast Asia or the United States. PR marks are only manufacturer or store IDs or design marks, and have nothing to do with value.

The basic decimal formula for determining the quality of gold materials is quite simple, as they are all measured in ‘parts per thousand’. This means that 9ct gold is calculated as follows: 9 (for 9ct) is divided by pure gold (24) and then multiplied by 1000 (as a decimal for pure gold). ie: 9/24*1000=375 That is the decimal value of 375 9ct gold and is sometimes shown with a decimal point in front – .375

The old Victorian standard for 15ct gold is calculated the same way – 15/24*1000 = 625 (not the numbers you put on your jewelry. Dental gold is 16ct or 666 recurs. But you can reverse it starting with this formula. Decimals and work back. Ex: 375 /1000*24 = 9

I have a platinum engagement ring and I found a wedding ring that I really like but the band is made of palladium. Is it safe to wear these two metals together without harming each other?

It will wear the soft metal in time but it may take several years. My grandmother’s wedding ring finally wore her engagement ring band but it took over 20 years to do so.

Platinum and palladium and together are great but I would take the advice of your local friendly jeweler and have them check both rings. Sometimes platinum can be a lower grade to make it harder – so check.

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