'Shekels' in the Bible

"My lord, listen to me. What is a piece of land worth four hundred shekels of silver between me and you? Therefore bury your dead."

Abraham listened to Ephron. Abraham weighed to Ephron the silver which he had named in the audience of the children of Heth, four hundred shekels of silver, according to the current merchants' standard.

It happened, as the camels had done drinking, that the man took a golden ring of half a shekel weight, and two bracelets for her hands of ten shekels weight of gold,