For an engagement ring featuring a white diamond, people often consider white gold and platinum bands. Both white metals complement the white colored diamond, yet there are some reasons why people favor platinum. Platinum is usually used in an almost pure form, ranging from 95 to 98 percent in terms of purity as far as jewelry pieces go. It looks virtually similar to white gold. The luster of both metals will remain the same for years as long as users care and maintain the pieces properly. In case you are thinking about buying a platinum engagement ring, you might want to consider the advantages and disadvantages of the precious metal to make an informed purchase decision. One of platinum’s main benefits is that it is hypoallergenic. On the contrary, if white gold contains a nickel alloy, some people are prone to allergic reactions wearing it. Platinum is mined less in comparison to gold, thus it is rarer than the other. Although per gram price of both tends to be similar, it takes more platinum to make a ring band since the metal is denser than gold. That adds to the platinum diamond ring price, which is likely to be more than a white gold ring featuring a same size diamond.