East-West
2018 is all about turning engagement rings on their side! For the past couple years we have seen A-listers like Emily Weiss set their diamond east-west instead of the traditional north-south style. I think this type of setting is becoming way more popular and mainstream. I would only suggest setting a diamond east-west if it is an elongated shape like an oval, marquise, or emerald cut otherwise you will not get the effect you are looking for.
[Photos courtesy @theclearcut]