4 months of work, in Paris and China.  7 kg (or 14 pounds) of magnets.  (5kg / 10 pounds, in the base, 2 kg in the sphere).  Hovers about 5 cm from the base.  It can rotate.  It can also be stable in the air.  Works with electricity or batteries.  Batteries work for 6 hours.
The sphere is made of aluminum.  Value: about 10,000 US$.  TED.