b84c5756f6a889fa332015e4458021f9

Hallmarks are used to determine the karat, ie the gold content of a jewel. This article presents the main titrations and karat in jewellery.

 

What is a karat ?


There are two definitions for the term carat:

  • Gemological, therefore for a diamond or other gemstone, it is an unit of weight equivalent to 0.2g. Thus, the more carats a gemstone has, the higher its size is and thus its value increases.
  • In jewelry, it is used to measure the metal purity in the jewellery. Thus, 99.99% pure gold is 24 karats of gold. The consequence is that the karat is 1 / 24th of the total mass of an alloy. Thus 18k gold means that there is 75 % gold (18/24 * 100 = 75%). A 14 karat gold jewellery contains 58.5% gold.

 

What is a hallmark ?


Among the hallmarks, we distinguish two types :

  • Hallmarks status or legal title, denoting the purity of a jewel. Some examples below :

p19vnmbilgv221k1r7ctv1msuh4p19vnmbilh1rt112241plv15lt11ee5p19vnmbilh3e9nnq1ndd1h061hn26

  • French hallmarks enable also to define the titration of a jewel. Below the mains french hallmarks :

p19vnml05su1v1b2e1bmu8dd16dp7

Seahorse

Pure gold 99,99%

p19vnnikrg1mal1oln5vo1i8u1s3s4

Eagle 1

Gold 22 karats 91,6 %

p19vnmlojcdk21tuihvfsl8edie

Eagle

Gold 18 karats 75 %

p19vnml5ifk3f1o0kva2jd1jo48

Shell

Gold 14 karats 58,5 %

p19vnmkga3169l1nkr1tpe1e6u1mfd4

Clover

Gold 9 karats 37,5 %

p19vnmkq3nn4o15ch6bl7d2mt06

Minerve

Silver 92,5 %

p19vnmkq3nban1b82c8bf30cdj5

Minerve 2

Silver 80 %

p19vnmle5t1fsl1k701b1kfqu5lfc

Dog

Platinum 85 %

p19vnmle5t1i1n1vj818v11a16102ob

Dog 1

Platinum 95 %

p19vnmle5tkm91n1ioanirq1928a

Dog 2

Platinum 90 %

p19vnmle5se5q1lutp721qbr2a9

Dog 3

Platinum 85 %
  • Master Hallmarks, designating the manufacturer’s brand of jewelery, goldsmith or Master. It is often hit in a diamond.
    The square punches generally means that the jewelry is gold plated or silver.

    One can find the marks « G », « GALV », « Murat », « GOLD-PLATED » which are often signs plated jewelery brand, or plating by electroplating. This is called galvanic gilding.


 

All news and infos about gold on

[button type= »info » target= »_self » link= »http://orobel.biz/en/info/news.html » icon= »info-sign »]Orobel.biz[/button]