Those of you who are interested in treasure hunting on your own might need to know what the gold hallmark stamps mean. It may be confusing at first, but this quick guide will help you out. The first essential you need to invest in is a jeweler’s loupe–a 30 x 21 mm is what I use. This will allow you to get an up-and-close look at the stones (to look for any chips or at the clarity) and the prongs (hopefully they are not worn). Next, check out the hallmark. The guide below will help you decipher what that stamp means:
- 375 = 9k
- 417 = 10k
- 583 = 14k
- 585 = 14k
- 750 = 18k
- 834 = 20k
- 875 = 21k
- 917 = 22k
The 3-digit number hallmark is stamped on a piece of jewelry of European origin. Above are the North American equivalents. Some hallmarks that indicate that gold is not real, not pure are: 10kGF (meaning gold filled), 18k HGP or 18k HGE (meaning heavy gold plate/electroplate).
Above are some of the regional markings for several European nations.
Still need answers? This book has EVERYTHING you need to know!
belle de ville March 18, 2009 at 3:39 pm:
To add to the confusion of gold stamps assay marks, I have an Edwardian necklace that is 700 or 16 karat gold.
francis September 21, 2010 at 11:11 am:
i have recently aquiered a small catapiller pin with what looks like cmall diamonds and some larger crystle type gems on it and the only mark looks like a bird inside a square with its tail pertruding out side the square the square has one point up so it might be like a diamond shape but all sides are equal im just wondering if you can tell me what compamy uses the stamp so i can send pics of it so they can look in there records to tell me what all was used to make it or if its just costume jewlery
Irene Love November 10, 2010 at 3:21 am:
Very informative. I used to have a lot of trouble with jewelry sellers from abroad. They would never admit it but most sell costume jewelry, using cheap prices to lure you in to buying them.
sheila April 1, 2011 at 2:16 am:
hi i purchased a ring at thrift shop pearls in a cluster and sapphires only marking is BETA inscribed inside ring…any info on that mark could this be a gold ring or just goldtone? it loks good………..
Engagement Rings June 28, 2011 at 10:39 am:
clear and useful description, it really helped me. you know thanks a your cool blog where i can find everything that i need.For more info please log on to http://www.whitefleur.co.uk
Pegge December 20, 2011 at 1:34 am:
I have a men's somewhat heavy gold ring with a diamond in it. The only marking inside it is 1152. The ring looks custom made. I can't find out anything about these numbers. Can you help? Thanks.
MARIA July 15, 2012 at 6:28 am:
Pendent with original chain – signed 900 on a setting that holds a round piece of glass with four added metal pieces – also the letter G in script center of one side…. also marked is 54 XI
…an original work of art?
possibly – 400 / 64 XI
email@example.com April 2, 2013 at 10:06 pm:
what dose malta mean on a gold chain
Norma April 7, 2013 at 2:12 am:
I have a ring that is stamped with 18K then GSL 3, then HEART SHAPE, then T. I only know the 18
K. Can anyone tell me what the other ones mean?
GCioffii April 10, 2013 at 5:21 pm:
I have a pair of earrings marked 750 (18K) and a mark that looks like an enter-twined V and O or a triangle and O. Were my mom's and have a swirl fan-like design. Probably from the late 50's early 60's. April 2013 Inquiry
Bree July 2, 2013 at 8:05 am:
I have a necklace with HWT 700 stamped on it… Is it real? An if it is what is its value
Ella July 30, 2013 at 3:36 pm:
I have a gold bracelet with a 700 mark on it and nothing else….does anyone know what this is? Thanks!
Andrea August 25, 2013 at 1:03 am:
I have an old gold and pearl brooch that is engraved with either S150 or 5150 on the back. Does anyone know what that means?
Karen December 27, 2013 at 4:33 pm:
I have braclet that has mark K circled and made in Taiwan around does anyone know more on this mark
Tdc December 30, 2013 at 1:33 am:
I have a set of gold blazer buttons (3 large and 4 smaller) and I'm hoping someone can help me identify who the maker is. They are marked 14k with a "circle" next to it that has either a capital "A" or "V" inside the circle with a "line" going through the center of the letter and extends to the inside edge of the circle. Any help would greatly be appreciated. Thank you.
Megan December 31, 2013 at 12:32 am:
I have a long, heavy, beautiful snail chain necklace that was my mother's. It appears to be gold, but I can not find any evident gold marking. However there is a small tag near the clasp that is in the shape of a tiny key, but not quite. More like an owl head on top of a "T". Any thoughts?
Day February 4, 2014 at 3:33 am:
I have a sapphire 14k gold ring with markings – 14k, 1k, a circle with a c in it and a B. What do these markings mean. I know it's 14k but don't know the rest. Thanks
PBlasius February 24, 2014 at 4:56 pm:
I have a large antique sapphire like stone ring with gold/bronze looking band marked with a circular L with a dot in the center. What is this?
Lara Blake April 20, 2014 at 6:45 pm:
Have my great grandmothers 18K gold wedding band with the initials AHS stamped underneath. Just wondering if anyone knew anything about the stamp AHS, what it stands for and where it comes from.
FaceJeffrey June 22, 2014 at 6:42 pm:
I have a Ring with a marking (E14k) what is the meaning of the (E)? all i can find out if that its maby a makers mark. Does anyone have any idea?