It means 18kt gold electroplated.
When these markings are stamped on a ring 18kt HGT ESPO, HGT stands for heavy gold electroplate meaning the ring is gold with a small amount of 18kt. ESPO is the jewelers stamp, in this case Joseph Esposito of Esposito Jewelry.
It basically means the ring is electroplated with 18kt gold not solid gold as per the more expensive rings! The term "karatclad" is also a tip-off that the item is electroplated rather than solid gold.
i have i ring with two different colours gold on it but it just marked mb is it gold
The 18k is the gold amount in the ring and the initials are either the company or maker. You have a good ring so take care of it. 18k can be soft and will bend easily.
"18kt" in a ring indicates the purity of the gold used, in this case 18 karat gold. The term "gersc" is not a standard hallmark or term related to jewelry, so it may be a personal inscription or specific to the jeweler who made the ring. It's recommended to ask the jeweler or manufacturer directly for more information.
"GE" stands for gold electroplate, meaning that it may not be a true gold ring. Have a licensed jeweler make that determination to be certain.
18k hgf would stand for 18k heavy gold filled ( not solid gold )
18KTGE and RSC: 18KTGE = 18 karat gold electroplated; RSC = jeweller's brand
Example for a Ring. The Base -the bulk- of the ring will be made of silver and has then been coated with 18kt gold (24kt being 'pure' gold).
I have a white gold ring stamped 750 HG with a diamond. The dimond is real. I filed the ring shank and it still tested 18kt. gold
about 435 dollars