This is a simple but complex question because for every shape , the answer is different. Below are answers based on many customers feedbacks:In round, H&A considered sparkles the most;In cushion, H&A considered sparkles the most;In pear, H&A considered sparkles the most;In oval, H&A considered sparkles the most;In radiant, H&A considered sparkles the most. Hence, H&A usually are sparkling more than any other cut due to its symmetrical cut pattern, and our excellent craftsmanship on cut range of H&A cut.