A talent is a measure of weight in the Bible that is equal to 75 pounds or 34 kilograms.

It was equivalent to 3,000 shekels. 

Archaeological digs have discovered shekels weighing between 65 and 80 pounds (29.5 to 36.3 kg) so this would be near the 75 pound measurement.

Talents were only used in the weighing of precious metals, specifically gold and silver. 

Solomon received 666 talents a year in tribute to him, which was considered a vast amount.  (1 Kings 10:14)  This pales in comparison to the amount that David bequeathed to Solomon for the building of the temple.  According to 1 Chronicles 22:14 there were 100,000 talents of gold and 1,000,000 talents of silver.