You´re right! It´s cased not marbled...

Mmh, at least the colour is similar.
In Germany we´d call it a ´Hausgräuel´ (home´s atrocity), which describes an ugly or kitsch object you´ve been
given by an important person. You therefore have to keep it displayed or put in place in case this person comes
for a visit. A modification would be the m-i-l-atrocity...
