Heidi, There are several reasons why platinum is more expensive than
gold. Platinum jewelry is generally made with an alloy that is 90-05%
pure platinum, 14K gold is 58% pure gold, 18K is 75% pure gold.
Platinum is a comparatively heavier metal. A ring made in platinum
will weigh approximately 41% more than 18K and 63% more than 14K gold.
Platinum is also more difficult to work with than gold. Platinum is a
harder metal that will offer a gem stone greater protection than
other metals. These are some of the main reasons that a platinum ring
will cost you considerably more than the same ring in gold.
Joel
Joel Schwalb
@schwalbstudio
http://www.schwalbstudio.com