Gold

 

Gold Alloys

STAMPFRACTION% GOLD% ALLOY
24K 24/24 ths 100% 0%
18K 18/24 ths 75% 25%
14K 14/24 ths 58.33% 41.67%
10K 10/24 ths 41.67% 58.33% 



 Gold Colors

Mix gold withThe color will be
Copper, silver and zinc Yellow
Copper, zinc and increased silver Green
Silver, zinc and increased copper Pink
Nickel or palladium, copper and zinc White


Platinum

Platinum Metals Group

Platinum Second rarest, but also most commonly used as the major metal in platinum jewelry
Iridium Used with platinum as an alloy and hardener
Palladium Used with platinum as an alloy and hardener
Rhodium Rarest; often used as a plating for white gold
Ruthenium Used with platinum as an alloy and hardener
Osmium Not used in jewelry

 

Platinum Purity

StampMeans
950, 950 Pt or Pt 950 At least 95% platinum
900, 900 Pt or Pt 900 At least 90% platinum
90 Plat 10 Irid
(or any similar combination)
90% platinum, 10% Iridium
Between 500 and 850 parts per 1000, the alloys must be identified, e.g. "585 Plat 416 Pall."
*Platinum products can legally contain as little as 50 percent platinum if the accompanying alloy is a platinum group metal and the two total at least 95 percent of the content.