Lab-grown diamonds are increasingly popular for their ethical appeal, affordability, and exceptional quality. As two of the most prominent online diamond retailers, James Allen and Blue Nile have expanded their offerings to include a wide selection of lab diamonds. Both companies are renowned for their innovation in the online jewelry space, but how do they compare when it comes to lab-grown diamonds?

Diamond shape is one of the most visually impactful choices in creating an engagement ring, setting the tone for style and personality. Each shape offers its unique allure, from the classic sparkle of a round brilliant to the sleek elegance of an emerald cut. However, each shape also has specific characteristics and features to consider, ensuring you get the best sparkle and clarity. Here’s a guide to the main diamond shapes, along with expert tips to look out for when choosing each one.