The number marks on precious gold jewelry are a little confusing for many people. We are usually used to seeing a brand of karat or money like this: 10K, 14K, 18K, Sterling, etc. The numbers mean the same thing.
For 14k the number is technically 583 but most manufacturers adopt the 14k Gold a little bit more than 14k, so the mark is 585 in most 14k jewelry. 18K is marked 750. If the mark is valid and there is a maker mark also in the jewel, the number means that these items are in 18K gold.
Here's where the numbers come from. Pure gold is called 24 carats. For 18-carat gold, 18 parts of pure gold are mixed with other metals so that the metal can be used in jewelry. 24k is too soft to get up or hold stones. 18 parts of pure gold divided by 24, or 18/24 is equal to 750. That's where the number comes from. The jewels are in 75% pure gold, 750 gold pieces with 250 parts of other metals on "1000" pieces. It is easier to consider it as a percentage that is pure gold in the recipe.
Sterling silver is marked 925. Sterling is pure silver at 92.5% and the rest is another metal, usually copper.
What does it mean if the ring marked 14K PR? The 14K simply means that it is 14K gold (Karat) and because of the K means that it would have been made in Southeast Asia or the United States. PR brands are simply the identifier of the manufacturer or store or even a brand of design, and have no relevance to the value.
The basic decimal formula for determining the quality of the gold content is quite simple because they are all measured Parts per mile. This means that the 9ct gold is calculated as this: 9 (for 9ct) is divided by pure gold (24) and then multiplied by 1000 (for pure gold as a decimal). This is: 9/24 * 1000 = 375 This 375 is the decimal quality for 9 carat gold and is sometimes stated with a decimal point in the front – .375 [19659002TheoldVictorianstandardof15caratgoldiscalculatedinthesameway-15/24*1000=625(notquitethenumbersyouhaveonyourjewelryOrdentalis16ctor666Butyoucanalsoinvertthisformulastartingwiththedecimalandindentedforexample:375/1000*24=9 In your case we can use 698/1000 * 24 = almost 17ct
I have a platinum engagement ring and I found a wedding ring that I like very much, but the group is in palladium. Is it safe to wear these two metals together without damaging each other?
It will wear softer metal over time, but it could take many years. The wedding ring of my grandmother finally took the ring of her engagement ring, but it took more than 20 years to make it.
Platinum and Palladium and pretty well together, but I would take advice from your local jeweler. Sometimes the Platinum can be a lower grade to make it more difficult – have it checked.