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.
18 karat heavy gold filled Cant sell for scrap
Heavy gold filled
Hi, it means HEAVY GOLD FILLED, just a posh name for gold plated. hope that helps.
The marking "18k HGF" on a ring indicates that the piece is made of 18-karat gold, which contains 75% pure gold and 25% other metals for durability. The "HGF" typically stands for "Heavy Gold Filled," meaning that the ring has a significant layer of gold bonded to a base metal, providing a gold-like appearance at a more affordable price. This combination offers the look of solid gold without the full cost, making it a popular choice for jewelry.
"18kt hgf" typically stands for "18-karat gold filled." This means that the piece of jewelry is made with a core of a base metal, such as brass, which is then bonded with a thick layer of 18-karat gold. Gold-filled items have a higher gold content than gold-plated items, making them more durable and resistant to tarnishing. It's a popular choice for affordable jewelry that retains the appearance of solid gold.
It could mean 18 karat "hollow gold filled". I'm not familiar with a manufacturer's hallmark that is "HGF".
Mercuryfluoride
"14k HGF" typically refers to a type of gold jewelry or item that is made from 14 karat gold and may include the initials "HGF," which could stand for a brand, designer, or manufacturer. The "14k" indicates that the gold is 58.3% pure, with the remaining 41.7% being other metals, which is common in jewelry for durability and color. If "HGF" has a specific context or meaning beyond that, it may require additional information to clarify.
A 14k gold-filled (HGF) ring typically contains a layer of gold over a base metal, which can be more resistant to tarnishing than lower-quality metals. However, if the gold layer wears off or if you have sensitive skin, the underlying metal may react with moisture or sweat, potentially causing your finger to turn green. To minimize this, it's best to keep the ring dry and remove it before activities like washing hands or exercising.
The formula given is for mercury (I) fluoride, also known as mercurous fluoride.