GF= stands for "gold filled" Gold Filled (heavy plating), usually has a fraction, For Example:1/20 10K GF found at: http://nitacreations.blogspot.com/2007/10/jewelry-markings-what-do-they-all-mean.html
AMCO is the company that manufactured the piece of jewelry. The 14K represents the carat weight of the gold. The GF stands for gold filled. AMCO went out of business in 1970.
gold filled unlike g.p which is gold plated GF is full gold and makes the jewelry more valuable
925 is the mark for sterling silver. GF MEANS Gold Filled & my guess is that GFS Means GOLD.FILLED SILVER.
gold filled
gf means gold filled
the GF stands for GOLD FILLED
This means that it is not pure gold, The 18 k gf tells you that this is a gold filled piece of jewelry, which means it is covered with a layer of gold but has a base metal underneath this layer.
girlfriend
It almost always means that the piece of jewelry is Gold Plated over a Silver piece of Jewelry I work in the jewelry business and the above answer is incorrect. 585 is the stamp for a peice that is 14K gold. If it is plated it will have additional letters such as GE for gold electroplate or GF for gold filled. If it is stamped 585 P that stands for plum and has been tested to be 14K solid gold.
it means girlfriend.
In the U.S., solid gold jewelry is marked with the purity and the hallmark (trademark) of the maker. So, for example, my wedding ring is marked "14K FG" which means it is 14 karat gold, made by Frederick Goldman, Inc. The maker's hallmark can usually be found by searching the US Patent and Trademark Office's trademark database (but the search will probably be tedious).There is, however, an exception, and that is that "GF" is the standard abbreviation for "gold filled" which means it is a cheaper metal core coated with gold on the outside. In other words, it is not solid gold. It would be simply crazy for any jewelry maker to select the hallmark "GF" when that normally mean that it is not solid gold, so you can expect that anything marked "14K GF" is not solid gold, although it should also have an indication of the gold content, e.g. "1/20 14K GF" would mean that the gold coating is 14 karat gold, and is 1/20th of the total weight.