The "Z" countries, Zambia, Mozambique, and Zimbabwe ae all located in southeastern Africa..  Because there is a lot of border crossing before some specimens are bestowed with their origins and the borders themselves transect some of the deposits, alleged countries of origin may be one or two off.  It is probably better to think of the origins as regionally rather than politically determined.  
     The two on the left are old specimens from Mozambique.  The first is terminated by contact on the top, and the second shows a rare, smooth face which is a termination that almost looks sawn and polished. 

     On the right are two that were recently mined in Zimbabwe.  Note the low relief vicinal forms and the "modified hex outline" of the second crystal.  These are quite common, and one can often find them on Ebay.


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