WHITE GOLD is a harder metal and it does not scratch as much as platinum therefore it keeps it’s shine. However, it is true that white gold has a slight tint of yellowish color (mostly at the bottom, since the top of the ring is all diamonds) , due to the fact there is no such thing as white gold in nature. In order to create white gold, yellow gold is mixed with white alloys and the end result is a quite white metal. Afterwards white gold gets dipped in a liquid called rhodium to achieve the crisp white color. When the rhodium plating wears off in time, the yellowish color comes out and the ring needs to be re-dipped. This usually happens in 1 1/2 to 2 years time, however in some cases it happens much more rapidly due to the way the customer wears the ring or just because of the certain acids our skin creates (For example, all the necklaces I wear take a dark color in about 2 weeks time, and I have no problem with rings or earrings I wear) and it could be polished every 2 years or so to replenish the beautiful white color on the ring. With 14kt white gold the yellowish tint is less noticeable since there is less pure yellow gold used in them versus 18kt white gold. We carry both 14kt and 18kt white gold in our stock, however we have more 18kt white gold since the jewelry industry (all the big names of the industry such as Cartier, Tiffany, Harry Winston, etc.) produces their jewelry in 18kt due to the fact it is more valuable and finer gold.
PLATINUM is a softer metal, therefore it gets scratched more than white gold and also goes dull in time. It needs to be polished and dipped every 2 years so that it is crisp white, since it is originally a grayish metal.