Choosing a 1 Carat Diamond Using the Four C’s Four C’s understanding is a must so that you can start your journey toward a beautiful diamond. Budget and personal taste affect decisions.

The star of the show, however, is a 15.51-carat fancy vivid yellow diamond (pictured top). Positioned between two white diamonds on top of a ring ... $950,000 to $1.25 million at the auction.

I tried an engagement ring from Quince, the online direct-to-consumer brand. Its center stone is a 3 carat lab-grown diamond set on a simple gold band.