Here's an example of a shell fragment from Kimberley. The larger civilian population in Kimberley at the time of the siege probably accounts for the fact that most seem to emanate from there.
During the siege of Kimberley shell fragments were gathered with eager interest and fascination. The price of a complete exploded shell was £5, a shell base sold for £1 to £2, and smaller pieces fetched varying amounts depending on their size but typically 3 to 15 Shillings. The people involved in this trade became very knowledgeable on the subject and could differentiate and discuss shrapnel, ring shell and different types of fuses.