Karoonda is the type specimen of the CK-meteorite class, meaning that it is the first CK chondrite to be known or recognized. It is one of only two known witnessed CK-chondrite meteorite falls. I was able to track down the original report of the discovery of the stone. From Nature:
A week later, a physical description was posted:
This is a vial of fragments totaling 4.6 grams. This specimen was collected in December of 1930, along with the rest of the samples recovered by the University of Adelaide team.