The round Canadian diamond is and for many year was the most popular diamond shape. However the popularity of the round Canadian diamond grew rapidly in the past 2-3 years. Fancy shape Canadian diamonds grew in popularity with the Halo ring. In the past 2-3 year the trend was using round Canadian diamonds in cushion and round halo rings. That trend coupled with the popularity of the round Canadian diamond solitaire created a healthy demand for round Canadian diamonds.