Here’s a look at the most popular and emerging diamond shape trends in select states—and the styles that may complement them best. California. Most popular: Round Brilliant ...

The round-cut diamond is rather self-explanatory—it is round like a perfectly symmetrical circle. Despite being a traditional shape, the diamond can be easily spruced up with an edgy setting.

Connecting all the dots, we discover that a circle in taxicab geometry looks like a diamond. It has corners, and it’s not round. One of my students shouted in protest when she realized this.

Here’s a look at the most popular and emerging diamond shape trends in select states—and the styles that may complement them best. California. Most popular: Round Brilliant ...