WITHOUT ACID,OR OTHER TESTING IT IS HARD TO DETERMINE THE PURITY OF GOLD, IF ANY IN ANY GIVEN ITEM.Many hallmarks,G.F.,18KGT .950 etc,enough to fill a phone book.If you really, really want to know electronic testing of any gemstones is generally an indicator.A reputable pawn shop might be able to help you out.
I'm not sure what KGT means. If it's KGP it typically meant it's gold plated.
"18kt" stands for 18 karat, which indicates the purity of the gold used in the jewelry. "CL" typically means "Cartier Love," referring to the Cartier Love collection of jewelry.
It is Gold 18 ct
rolled gold plated
"18kgt" stands for 18 karat gold plated. It indicates that the jewelry item is made of a base metal and coated with a thin layer of 18 karat gold.
18 karat gold is 75% gold. This means that 75% of the metal in an 18 karat gold piece of jewelry is actually gold.
BO on jewelry is the mark of the manufacturer. 18k means that there are 18 carats of whatever metal in that piece of jewelry.
I suppose that you think to 18 kgp: the meaning is a metal "plated with 18 karat (75 %) gold".
This means that the jewelry is gold plated with 18 karat gold. You can get different kinds of gold in your jewelry.
18k white gold
18 karats cw: 18/24 by weight
On most 18KT jewelry you will see a small stamp on the inside of the band identifying it as just that "18KT".