Close, it was made of papier mache. That's a good stand-in for neutronium, wouldn't you say?
I feel a geek attack coming on. Of course genuine neutronium would collapse into a perfect sphere...but then less than 2 solar masses wouldn't be enough to overcome fermionic repulsion- the thing would explode. Then again if it were larger than 2 solar masses, even if it held it shape, it would be darn hard to move around with all that mass. But then you can invoke warp fields... help me!