4.24 grams. H5
Observed fall March 5, 1960, in Burkina Faso.
From Wikipedia:
TKW probably over 1,000 kg. After three separate detonations, several thousands of stones rained down over an area of about 70 square kilometres (27 sq mi). The sound of the fall was heard as far as Ouagadougou, which is 100 kilometres (62 mi) away. Eyewitnesses said that some trees were broken and henhouses destroyed. The largest stones recovered weigh up to 10 kilograms (22 lb).
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