It could mean 18 karat "hollow gold filled". I'm not familiar with a manufacturer's hallmark that is "HGF".
What 14k h.g.f mean
18k hgf would stand for 18k heavy gold filled ( not solid gold )
Heavy gold filled
18 karat heavy gold filled Cant sell for scrap
18K gold Made in Italy
does 14k kg meanin jewelry
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
18K Gold Brevetto Italian
HMS is a company that specializes in 18k, 14k, 10k and platinum jewelry
"HGF" or hollow gold filled jewelry is considered a fine jewelry and should be treated with the same caution when cleaning. To clean HGF jewelry a solution of Mr. clean, water, and ammonia can be used. Mix half Mr. Clean and water with a small amount of ammonia. This is safe for all types of fine jewelry and is used by many jewelry stores. Allow the jewelry piece to soak for 15 seconds in this solution then rinse with water and dry.
BO on jewelry is the mark of the manufacturer. 18k means that there are 18 carats of whatever metal in that piece of jewelry.
75% is total gold in your jewelry and 25% are other metals