Marquise cut diamond rings have a historic and romantic connection, which makes them the ideal choice for an engagement ring.       However, customers who are planning to buy a marquise cut diamond ring should take note of the fact that these types of diamond rings are a bit vulnerable to chipping. Another disadvantage of marquise cut diamond rings is that they are not as brilliant as round cut diamond rings.     If you are planning to buy a marquise cut diamond ring for your loved one, then the first and most important thing you should do is to ensure that the diamond ring does not have a bow tie effect. In most cases, bow tie effects in diamond wedding and engagement rings are caused by misaligned facets. This will make your diamond ring look old and unattractive, which means it is best to avoid diamond rings with bow tie effects.