Platinum rings are also available in a wide variety of shapes, colors, and designs. As you would probably know, platinum is often called the “king of metals” by many jewelers and diamond merchants because they are pure, enduring, and rare. However, several customers have a misconception that the price of platinum diamond engagement rings is too high. The reality is that cheap and affordable diamond platinum engagement rings are also available aplenty in the market. Some online jewelry stores might even offer discounts and deals on these diamond rings. Customers who are in the market to buy platinum diamond engagement rings will have to ensure that their preferred diamond ring is highly pure. It is true that 90 to 95 percent pure diamond rings come with a higher price tag, but they last for a very long time. However, if you are unable to afford such a diamond engagement ring, it is best to look for a diamond ring, which is at least 80 percent pure.