This is the 3D Model of Well Know "Sword Art Online" Anime,
one of Kirito's Sword "Dark Repulser" made with Crystal Material.

Dark Repulser (, Dku Riparus?) was a one-handed long sword, created by Lisbeth for Kirito out of a Crystallite Ingot, which was obtained from a special quest. Whenever Kirito used the Dual Blades skill, he wielded it alongside Elucidator. This weapon was destroyed during the fight with Heathcliff on the 75th Floor.