1.Heat 1 Tablespoon Olive Oil And 1/2 Tablespoon Butter In A Large Skillet Over Medium Heat. Season Scallops With Salt And Pepper. Place Half Of The Scallops In The Skillet Without Crowding; Cook Until Browned, About 2 To 3 Minutes On Each Side. Remove Scallops To A Plate. Heat 1 Tablespoon Olive Oil And 1/2 Tablespoon Butter In The Skillet, And Cook Remaining Scallops. Remove To Plate. 2.Wipe Out Skillet, And Return Skillet To Medium Heat. Pour In Wine, And Boil 1 Or 2 Minutes, Until Reduced To About 2 Tablespoons. Reduce Heat To Low, And Whisk In The Remaining 4 Tablespoons Butter; Just Softening Butter To Form A Smooth Sauce. Stir In Salt, Lemon Zest, And Tarragon. Pour Sauce Over Scallops.