I've heard and read
many different descriptions of what the weight of a talent is in
pounds or kilograms.
However, they all convinced that their value is
the correct one.
Revelation 16:21 And there
fell upon men a great hail out of heaven, every
stone about the weight of a talent: and men
blasphemed God because of the plague of the hail; for the
plague thereof was exceeding great.
If the correct number of pounds/kilograms for each
talent is known, and the density of ice, then the size of the
hail can be known.