In some entries (cif-files exported from the COD), the information for  
the crystal color is not given in the corresponding field  
"_exptl_crystal_colour" but e.g. in "_exptl_crystal_description". In  
"_exptl_crystal_colour", some other information is given instead, e.g.  
crystal morphology

4000111 = POLYHEDRA
4000670 = CUBOID
4000671 = CUBOID
4000672 = CUBOID
4000674 = PARALLELEPIPED
7050048 = SHARD
7102837 = IRREGULAR
4000113 = COLUMN                

or other data

2103897 = P -1
2209508 = 27.5
4000492 = COLOR
4021684 = C
4021714 = 0.70
4022885 = .5
4023842 = 0.60
4023858 = EMPIRICAL
4024213 = COLOR
4024502 = COLOURS
4060163 = 0.2
7102139 = 7
7102378 = L