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Gold Marks On Jewelry
 
  This Gold Mark page is my opinion of Gold Mark terms. Sometimes marks are partially or completely worn off or are fake, test gold when the appearance of the item looks questionable. I assume no liability.  
 
 Common Marks For Genuine Gold
Gold jewelry from the U.S. is normally marked with a karat designation (with a K). This measurement is based on parts per 24,
so 14k gold actually is 14/24ths gold purity or 14 parts pure gold and 10 parts non-gold such as brass.
     
480PM contains 25 percent gold 25% gold, 21% Silver, 2% Palladium and 52% alloy, sold at some department stores
6K or YellOra
contains 25 percent gold
25% gold, 21% Silver, 2% Palladium and 52% alloy, sold at some department stores
8K contains 33 percent gold 333 parts per 1000 gold, foreign gold, most often marked 333
9K contains 37 percent gold 375 parts per 1000 gold, this is common in the United Kingdom (England)
10K, 10KT, 10Kt contains 41 percent gold 417 parts per 1000 gold, harder gold for men's jewelry
10KP 10K plumb, same as 10K The term "10K plumb pure" was used in the 70s & 80s, and is no longer used
12K  see note*

contains 50 percent gold

500 parts per 1000 gold, *most of the time associated with gold filled, (see 12K GF) or dental gold & gold crowns which are about 12K gold
14K, 14KT, 14Kt contains 58 percent gold 585 parts per 1000 gold, more delicate gold for ladies jewelry
14KP 14K plumb, same as 14K The term "14K plumb pure" was used in the 70s & 80s, and is no longer used
18K, 18KT, 18Kt contains 75 percent gold 750 parts per 1000 gold, more delicate gold for ladies jewelry
20K contains 83 percent gold 833 parts per 1000 gold, softer, bendable gold, I do not recommend for jewelry
22K contains 92 percent gold 916 parts per 1000 gold, softer, bendable gold, I do not recommend for jewelry
23K contains 96 percent gold 958 parts per 1000 gold, softer, bendable gold, I do not recommend for jewelry
24K or 9999 contains 99.99 percent gold 999 parts per 1000 gold, this is very bright in color and is naturally malleable
K24 a jewelry company Contains no gold, this is a name of a jewelry maker, not gold
Dental gold

unmarked dental gold

Dental gold is a minimum of 12K gold, which is 50% pure gold. 12K (up to 14.8K) gold has a like hardness of human teeth and is best suited for dental use.
KP

means karat plum (pure)

Was used in the 70s & 80s to mean a full carat pure or plum and is no longer used. Do NOT confuse with KTP which means plated.
     
Common Marks For Genuine Foreign Gold
European countries mark gold with numerical fineness marks in parts per thousands, for example:
375, 417, 585, 750, etc. for gold. The makers initials or symbols may be used before or after these numbers.
       
  333 same as 8K 333 parts per 1000 gold
  375 same as 9K 375 parts per 1000 gold
  410 or 417 same as 10K 410-417 parts per 1000 gold
  583 or 585 same as 14K 583-585 parts per 1000 gold
  750 same as 18K 750 parts per 1000 gold
  800 19.2K 800 parts per 1000 gold
  916 same as 22K 916 parts per 1000 gold
  960 same as 23K 960 parts per 1000 gold
  990 same as 24K 990 parts per 1000 gold
  999 same as 24K 999 parts per 1000 gold
  9999 same as 24K 999 parts per 1000 gold
 
General Gold Plate Marks
  Gold plate is a very thin plating (covering) of gold (about 1/1000 - 1/1,000,000 of an inch). Heavy gold electroplate might be 2 or 3/1000s of an inch thick.  
     
14KHGE 14 karat heavy gold electroplate plated with a thin layer of 14K gold
18KGE 18 karat gold electroplate plated with a thin layer of 18K gold
18KHGE 18 karat heavy gold electroplate plated with a thin layer of 18K gold
24KGB or 24K GB 24 karat gold bonded same as plated
24KTGP or 24 KTGP 24 karat gold plated plated with a thin layer of 24K gold
Clad in gold covered in gold plate plated with a thin layer of gold, usually 18K
Electroplate electroplate plated with a thin layer of gold, usually 18K
Electroplated electroplate plated with a thin layer of gold, usually 18K
Electroplating electroplate plated with a thin layer of gold, usually 18K
EP electro plate plated with a thin layer of gold, usually 18K
GE gold electroplate plated with a thin layer of gold, usually 18K
GEP gold electro plate plated with a thin layer of gold, usually 18K
Gold Clad or Clad in Gold gold electro plate plated with a thin layer of 18-24K gold
Gold Layered gold plate plated with a thin layer of gold, usually 18K
Gold Plated gold plate plated with a thin layer of gold, usually 18K
GOLD PLTED gold plate plated with a thin layer of gold, usually 18K
Gold Tone gold color applied covered in gold color, not gold plating
GP gold plate plated with a thin layer of gold, usually 18K
HE heavy electroplate plated with a thin layer of gold, usually 18K
HGE heavy gold electroplate plated with a thin layer of gold, usually 18K
KARATCLAD karat clad in heavy gold electroplate plated with a thin layer of gold, usually 18K
KGB karat gold bonded another way of saying plated
KGP karat gold plate plated with a thin layer of gold, usually 18K
KHGE karat heavy gold electroplate plated with a thin layer of gold, usually 18K
KTP karat plate plated with a thin layer of gold, usually 18K
Layered layers of gold applied plated with a thin layer of gold, usually 18K
Overlay gold overlay plated with a thin layer of gold, usually 18K
Plated plated plated with a thin layer of gold, usually 18K
TB technibond a layer of gold covering, bonded to the base metal
Technibond technibond a layer of gold covering, bonded to the base metal
Vermeil gold plate over sterling gold plate over sterling silver
WGP white gold plate plated with a thin layer of gold, usually 18K
YGP yellow gold plate plated with a thin layer of gold, usually 18K
     
electroplaqué d'or gold electroplate plated with a thin layer of gold, usually 18K
plaqué gold plate plated with a thin layer of gold, usually 18K
     
 
Gold Filled & Rolled Gold Are A Type Of Very Thick Covering
Gold Filled  -  Rolled Gold  -  Rolled Gold Plate  -  Rolled Gold Filled

These interchangeable terms refer to the same manufacturing process: a thin sheet of gold that is laminated/bonded to a lesser metal (usually brass). The two layers of metal are heated under pressure to fuse them together. The result is a piece of jewelry that (in most cases) has a gold covering with 5% (1/20th) of 12 karat gold compared to gold plating that has a tiny gold covering of about 2/1000ths (of an inch). The math on actual gold scrap recovery is: 1/20th 12K GF is (1/20th is 5% and 12K is 50% pure gold) = 2.5% pure gold recovery, by weight.
     
1/8 1/8th gold covering covered in 1/8th, usually 12K* gold, by total weight
1/10 10K 1/10th gold covering covered in 1/10th, 10K gold, by total weight
1/10 1/10th gold covering covered in 1/10th, usually 12K* gold, by total weight
1/14, 10K 1/14 1/14th gold covering covered in 1/14th, usually 12K* gold, by total weight
1/20 1/20th gold covering covered in 1/20th, usually 12K* gold, by total weight
1/20 GF 1/20th gold covering covered in 1/20th, usually 12K* gold, by total weight
1/30 1/30th gold covering covered in 1/30th, usually 12K* gold, by total weight
1/30-14K R.G.F. 1/30th 14K gold filled covered in 1/30th, 14K gold, by total weight
1/30-14K R.G.P. 1/30th 14K gold filled covered in 1/30th, 14K gold, by total weight
1/40 1/40th gold covering covered in 1/40th, usually 12K* gold, by total weight
12K GF 1/20th 12K gold filled covered in 1/20th, usually 12K* gold, by total weight
14K 14/20 GF 14/20th 14K gold filled covered in 14/20th or 7/10ths 14K gold, by total weight
DBL GF double gold filled the gold layer is applied to both sides of the base metal
GF gold filled covered in 1/20th, usually 12K* gold, by total weight
Gold Filled gold filled covered in 1/20th, usually 12K* gold, by total weight
RG rolled gold covered in 1/20th, usually 12K* gold, by total weight
R.G.F. or RGF rolled gold filled covered in 1/20th, usually 12K* gold, by total weight
R.G.P. or RGP rolled gold plate covered in 1/20th, usually 12K* gold, by total weight
Rolled Gold rolled gold covered in 1/20th, usually 12K* gold, by total weight
     
Guaranteed 5, 10, 20, or 25 years** on gold filled watches covered in 1/20th, usually 12K* gold, by total weight
Warrantied 5, 10, 20, or 25 years** on gold filled watches covered in 1/20th, usually 12K* gold, by total weight
     
doublé d'or gold filled covered in 1/20th, usually 12K* gold, by total weight
plaqué d'or laminé rolled gold plate covered in 1/20th, usually 12K* gold, by total weight
     
     * The covering from 1/8th to 1/40th and/or the gold purity mark (karat) from 10k - 14k may vary, both should be stated on the jewelry.
     ** Guaranteed or Warranted are used to guarantee the quality of gold filled watch cases, the higher the years, the thicker the gold.
 
     
 
 Additional Descriptions For Genuine Gold
The colors of gold below, do not effect the karat or purity of what is marked on the jewelry, except the last one.
     
Yellow gold yellow colored gold normal karat gold with brass alloy to give the metal a rich gold color
YG yellow colored gold same as above, should be accompanied with a karat mark like 14K YG
White gold silver colored gold same as normal karat gold with nickel & palladium alloy
WG silver colored gold same as normal karat gold with nickel & palladium alloy
Rose gold pink or red colored gold same as normal karat gold with copper alloy to give the metal a red color
Green gold green colored gold same as normal karat gold with silver alloy to give the metal a green color
Gold Post just the post is gold the rest of the earring is not gold
Black Hills gold multi colored gold same as normal karat gold with a combination of the color techniques above
Black Hills silver has some gold applied to silver small gold embellishments applied to sterling silver jewelry, mostly silver not gold
 
Mysterious or Religious Combinations -
of 7 or 8 metals is a modern day scam.

Who in their right mind would add gold to a statue at the rate of 1-10 percent and NOT mark the gold content. The items are not testable with most gold testers. Don't get duped into believing that some commercial monk is wasting their gold for your benefit.
   
Ashtadhatu, -
   Ashta Dhatu
In the early century was a mixture of eight metals, equal parts of Gold, Silver, Copper, Mercury, Lead, Iron, Zinc, Brass. Now it is just a gimmick to get you to buy and is likely 100% brass or TOXIC.   
7 ALLOYS Or seven alloys, is just a gimmick to get you to buy on ebay or tourist markets and is likely 100% brass.
8 ALLOYS Or eight alloys, is just a gimmick to get you to buy on ebay or tourist markets and is likely 100% brass.
   
More Terms
Karat Is a term used for gold purity when divided into 24 parts. 14K for example is 14 parts gold and 10 parts other metal.
Carat Is a term used for gemstone weight. For example one carat weighs 0.20 grams and five carats weigh one gram.
Carrot An orange colored vegetable that Bugs Bunny likes.
 
Don't mix up the karat with the carat (for gemstone weight). It is correct to say one carat diamond ring set in 14 karat gold.
 
 
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