Two tiaras with diamond blooms are paired up in this contest!JONATHAN NACKSTRAND/AFP via Getty Images, PAUL VICENTE/AFP via Getty ImagesPrincess Dagmar's Floral Tiara vs. The Imperial Chrysanthemum TiaraJulien M. Hekimian/Getty ImagesPrincess Dagmar's Floral TiaraThis detailed diamond floral tiara originally belonged to Princess Dagmar of Denmark, a sister of King Christian X (and King Haakon VII