The GF stands for gold-filled, I believe the H stands for hard.
The item is gold-filled, meaning it has a micro-thin layer of 18K gold over a base metal.
Older gold-filled items such as pocket watches used to be stamped 1/20 12K GF, meaning 12 Kt gold (50% pure) is layered over the base metal, with the gold weight being at least 1/20th of the total weight of the item.
18k hgf would stand for 18k heavy gold filled ( not solid gold )
This is not a solid gold ring. The structure of the ring is made of another metal. Through electroplating a very thin layer of gold is adhered to the outside of the ring. The coating is 18k, and is white in color. These rings can be quite beautiful, but do not have gold value.
Heavy gold filled
18 karat heavy gold filled Cant sell for scrap
Hi, it means HEAVY GOLD FILLED, just a posh name for gold plated. hope that helps.
It could mean 18 karat "hollow gold filled". I'm not familiar with a manufacturer's hallmark that is "HGF".
HgF
Mercuryfluoride
Molecular formula is Hg2F2 . The empirical formula is HgF . For empirical formulas you reduce the numbers as far as possible.
An angle whose measure is 20 degrees!
That would be Mercury(II) fluoride. Idiot.
The formula given is for mercury (I) fluoride, also known as mercurous fluoride.