It used to be that an engagement ring was just a circle. However they have been made in unusual designs. Silver rings are more in vogue these days just simply because the price of gold has gone through the roof.
If you want to be a bit unusual then one of the coolest designs is the European style known as Russian Wedding Rings. Basically these are three circles of silver that interlock on the finger. You can get these rings in very thick or very thin silver. Many of these designs are also inset with gorgeous stones. The chunkiest version of this type of ring is most modern and very sixties looking.
In essence the three circles symbolize the couple and God and the union interlocking with the holy guidance of higher powers.
Yet another interesting ring is the spinner ring. This type of ring is a band that features another inlaid piece of silver so that the ring rotates around your finger like a wheel. The nicest ones have a rope like shape that is very elegant and simple.
Of course you can get high-end versions of this ring made by Calvin Klein. About twenty years ago he stole the idea of the Russian ring to create his famous eternity ring, which is made out of three circlets of different types of gold.
You may have noticed that there is a new shape of wedding band around. This type of ring shape crests down into a point. It is called the wishbone shape.
The reason that it has a point is that it is meant to accommodate the really cool pear shaped and marquise shaped single stones that are also so much in vogue. These large single stones are very much complimented by the inverse V shape of the glamorous wishbone ring.
The wishbone shopped badly is usually between 5mm and 3.5 mm and very much in vogue because chunkier rings like this are definitely in style for 2009.
When buying this type of ring you might also want to make sure that the V does fit the bride in a way so that the point of the V does not dig into the finger in any way. Usually this is not a problem if the ring is well designed but it can be a challenge if the ring is quite thin. To make sure it is comfortable by the thicker or larger wishbone shaped ring so the point does not touch the finger.