:: : it means it is "'attracted "'to magnetic fields . diamagnetic objects are repelled by magnetic fields . but remember in each case, the effect is generally quite weak . for Gd 2 O 3, the mass susceptibility is 668.5, but for Gd metal its a whopping 9488 . so Gd metal is much more magnetic than Gd 2 O 3 . for a gentle walkthrough, http : / / www . sigmaaldrich . com / Area _ of _ Interest / Chemistry / Materials _ Science / Energy _ Source _ Materials / Magnetic _ Materials / Tutorial / Properties . html Xcomradex 22 : 35, 17 July 2006 ( UTC)