Italian 14K Gold Mark Forged on Gold Jewelry
Global  
realorrepro

Two widely faked marks on base metals in the market are "14K Italy" and "585" (Fig. 1). These forged marks commonly appear on pieces with no gold content.

 

Review of Gold Marks
 
Pure gold, also called fine gold, is 24 Karat (or 24K). Such a mark represents a ratio or proportion of gold to other metals which may be present with the gold. This term should not be confused with carat which is a unit of weight for gem stones.
 
Alloys of gold are always expressed on a basis of 24 parts. Pure gold, with no additives, is 24K; 14K is 10 parts other metal to 14 parts gold. Gold less than 10K cannot carry a karat mark or be legally called gold in the United States. In Europe, most jewelry is a minimum of 14K.
 
In addition to, or in place of, the karat mark European jewelry commonly carries a separate number, or fineness mark. A fineness mark expresses gold content as numeric proportion to base metal. The fineness of 14K gold, for example, is expressed as .5833. On authentic 14K marks from Italy, this is rounded off to 585. The fineness of 18K gold is .7500; 10K is .4167.
 
Items described as gold filled are made of a base metal to which a layer of gold has been attached. The gold in this layer is a minimum of 10K. The common practice is to use 10 percent (by weight) of 12K gold to make gold filled layers. This means the actual gold on gold filled items is 5% pure (12K= 50% gold content; 10% of 50%=5%). Gold filled products are commonly marked "1/20th GF", "1/20th 12K GF" or "1/20 12K Gold Filled". This is because 5% is 1/20th of 100%. Rolled gold is the term for a layer only half as thick, or 1/40th which means the gold is only 2½% pure.
 
Often the mark indicating gold filled will be removed and another mark for a higher karat will be substituted. Where forged marks are suspected, the fineness of the gold must be tested. Testing kits for gold are available at most jewelry supply wholesalers.

 
 


 
 


 
More in Global
Human Sperm Retains Viability in Outer Space Conditions

The sperms in space had 100 per cent concordance in DNA fragmentation rate and vitality. It that it must not be unreasonable to think about the possibility of repro...

Recently posted . 3 views

Man 'Meats' His Maker After Getting Sucked Head First Into Meat Grinde...

If you didn't have the guts to watch Final Destination - a movie documenting some of the most freakish ways people die - the following incident might not be t...

Recently posted . 2 views

This Surgeon Wants To Connect Your Brain To The Internet

Movies like Blade Runner 2049 tend to make the future of technology look dystopic. As storytellers, we have progressed from looking at only flying cars in the futur...

Recently posted . 2 views

Flipkart co-founder Binny Bansal sells part stake to Walmart for 531 c...

The latest sell-off, however, is not Binny Bansal`s first monetisation of his equity holding in 12-year-old Flipkart.

Recently posted . 9 views

1 in 4 Women Goes on a Date Not for the Sake of Romance but for Grabbi...

New research finds that 23 to 33 per cent of women in an online study admitted they have engaged in a "foodie call".

Recently posted . 9 views

How Tiny Insect Stopped Dozens Of Trains, Delayed 12,000 People In Jap...

The power failed on a couple of lines serving southern Japan operated by Kyushu Railway Co., known as JR Kyushu, on May 30.

Recently posted . 10 views

 
 
 

Prashnavali

Thought of the day

Within our dreams and aspirations we find our opportunities.
Sue Ebaugh