Fig. 3From: Variations of the surface characteristics of Ryugu returned samplesChisel setup for the sample division. a Chisel setup under microscope in the glovebox. A circular wall is used to fix the sample and prevent from scattering of divided samples. b Photo of a tantalum chisel. c Photo of the cutting edge of a tantalum chisel after polished by hand using a diamond grindstone. d Microscopic image of sample division. This image was taken just before the division of A0017. The grain was fixed between the circular wall and the chiselBack to article page