With Trilogy ring you have triple the bling! Very simple! It is more of the thing you like. If you like a diamond, you will love having 3 of them on the same ring, the same finger!
In addition to the above - it has another meaning which the PAST, PRESENT, and the FUTURE. One can reflect on this idea and think about it as each one's past, or their past together but in the present, they are together, uniting and of course the future is the endless creation of things together. From cooking together, planning an outing, hosting friends to building a home and raising kids, all of these activities in the marriage are creation! The future is a never-ending creation.
Trilogy Rings can be 3 stones of the same shape and size or different stones in different shapes and sizes or heights. Basically, every ring that comes in 3s is a Trilogy.