SILVER
925 = Sterling Sterling
Taxco
MEXICO
PLATINUM
Pt Irid. Plat.
Pt 900
Pt 950
PLAT
GOLD
K = Karat ( 14K would be 14 karat etc...)
KP = Karat Plumb (the manufacturer guarantees it the minimum amount of gold)
410 = 10K
585 = 14K
750 = 18K
917 = 22K (Asia)
999 = 24K pure gold (Asia)
GF gold filled
RGP rolled gold plate
HGE Heavy gold plate
GP gold plate
KP Karat Plated
GS Gold shelled
EPNS Electroplated nickel silver (german Silver)
What about KP as in Karat Plumb
In Europe they use KP to signify that there are exactly X parts of gold, so 14KP means that there are exactly 14 parts gold or 58.5% gold.
Gold in the US, prior to October 1st 1981 it was legally allowed to be stamped ½ karat under the actual gold content if no solder was used in its manufacture. If solder was used it could legally be 1 full karat under the hallmarked karat content.
After October 1st 1981 gold jewelry not containing solder could only deviate from its hallmark purity by 3 parts in 1000, and gold jewelry with solder is allowed to deviate by 7 parts in 1000.
It is not legal to hallmark Gold Jewelry made in the US at less than 10K (you will see 9K as an example in England).
Is it K or ct or just a 3 digit number? The ‘ct’ is interchangeable with ‘K’ for karat. The term KARAT refers to the fineness of gold. The word CARAT usually refers to a weight, generally for gemstones but is also used for gold. All a bit confusing, but both are OK to use. The number refers to the fineness of gold in parts per 1000. All these marks are acceptable as it depends on where it was made.
There are many carat amounts used in jewelry. Below are the most common…
There are many carat amounts used in jewelry. Below are the most common…
Other countries will designate their gold content by stamping the numbers above into the jewelry. For example "625" "750" "916". I came across a ring once that had a three digit marking not like the ones I was use to seeing. I took it to a jewelry store and found out it was gold. The place I had acquired it from had processed it as "junk" because they did not know of these different markings.
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