Wedding rings are usually made of gold. 14-carat gold is the most suitable metal for jewelry to be worn every day. Such gold does not oxidize (darken) quickly and is relatively resistant to wear. 14-carat gold can be obtained in white yellow and pink.
Jewelry is also made from less or more pure gold. E.g. 9 kt products contain less pure gold and are therefore cheaper, and their weakness is mainly oxidation or staining of metal over time. 18 kt products contain more gold, but the weakness is greater sensitivity to wear and slightly higher price.
If you want something special and even more prestigious, you can think about platinum. Platinum is a precious metal, in appearance very similar to white gold. It is used practically in pure form, which makes the price of platinum jewelry higher. Indicatively, a platinum product is 2-3x more expensive than the same gold product. For more info go to 對戒.
Silver is also counted as a precious metal, and some people like it. Silver products are cheaper than gold or platinum. There are two disadvantages of silver. Silver is a softer metal and more sensitive to wear. Another weakness is the oxidation of silver, which means that such jewelry darker faster.
Of course, the rings are also made from other materials such as steel, ceramics, wood. These materials do not belong under precious metals, but this is not an obstacle not to choose such a ring. Wedding rings are something that is primarily your choice and chooses what you really want.