What does GF mean on jewelry?
GF means Gold filled — typically 5% gold by weight (Base metal + bonded gold). Partial — low value
Low but not zero. Some refiners buy gold-filled scrap in bulk. Wears far better than plating and vintage gold-filled has collector demand.
What the mark tells you
Gold filled is a genuine mechanical layer of gold bonded to brass, roughly 100 times thicker than plating. The fraction stamp tells you the ratio — 1/20 12K GF means 1/20th of the total weight is 12K gold.
You may also see it written as gold filled, 1/20 12k gf, 12kgf, 14kgf, 1/10 10k, rgp, rolled gold. They all mean the same thing.
What GF is worth by weight
A little, but rarely enough to sell. Gold-filled pieces are 5% gold by weight at most, bonded to a brass core; a 10 g piece holds perhaps half a gram of gold, and most refiners set a minimum batch well above that. Vermeil is sterling silver underneath, which is worth scrap silver — about $1.46 per gram today.
Is it worth anything?
Low but not zero. Some refiners buy gold-filled scrap in bulk. Wears far better than plating and vintage gold-filled has collector demand.
Where to find it
On a ring the mark is almost always inside the band. On a chain or bracelet look at the clasp or the tag beside it; on earrings check the post or the back. Marks are tiny and often worn — a phone camera zoomed all the way in usually reads one better than your eye does.
A stamp is evidence, not proof
Marks wear down, are struck only partially, and are occasionally forged outright. If a piece is valuable enough to matter, have the metal tested rather than relying on the stamp alone. Equally, an absent stamp does not always mean an absent metal: older and handmade jewelry is frequently unmarked.
Found something real? Value it
If the piece is solid metal or holds a stone, see what it is actually worth — both at retail and what you would genuinely be offered for it.
Value my jewelry