Item #58873 (possibly named "Monster Staff Ornate Jeweled Staff Blue Lightning Particles") doesn't exist. It may have been removed from the game.
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Monster - Staff, Ornate Jeweled Staff - Blue, Lightning Particles - Live
Monster - Staff, Ornate Jeweled Staff - Blue, Lightning Particles - PTR
Monster - Staff, Ornate Jeweled Staff - Blue, Lightning Particles - PTR 2
Monster - Staff, Ornate Jeweled Staff - Blue, Lightning Particles - Beta
Monster - Staff, Ornate Jeweled Staff - Blue, Lightning Particles - Cataclysm