Thursday, August 30, 2007

Gold education

Gold is graded in purity called Karats, 24 Karat gold is pure gold, also known as fine gold with a purity of 99.9%. An 18 karat gold ring is 75% pure gold and 25% alloy; while a 14 karat gold ring is 58.5% pure gold and 41.5% alloy.

Hallmark


Minimum Fine Gold Content Gold Markings Purity
24K 100% 999
18K 75% 750
14K 58.3% 585
10K 41.7% 417
9K 37.5% 375

Gold Colors and Mixture

Yellow Gold Gold with Copper and Silver Alloys
White Gold Gold Nickel, Zinc, silver
Green Gold Gold with Silver, sometimes Copper and Zinc
Red Gold Gold with Copper
Pink Gold Gold with Copper


Gold


Platinum

Platinum

Platinum is silvery-white precious metal and is usually more expensive than gold. Most platinum jewelry is 95% platinum and 5 %alloy. Platinum is heavier and more durable than gold with a slower wear factor.