Kanwar Vishwajit was a friend whose loss would be severely felt, Amarinder said in a statement.
The two had become close friends while they were studying in the Doon School in Dehradun, the statement said.
The chief minister described Vishwajit as a man full of life who inspired one and all with his vivacity and dynamism.
He said the former Rajya Sabha member was a "multifaceted personality" with qualities of the head and the heart.
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Vishwajit, considered close to late Prime Minister Rajiv Gandhi, was first elected to the Rajya Sabha in April 1982 from Maharashtra and returned for a second term in April 1988.
According to the family, Vishwajit was unwell for the past few days and was flown into Delhi from Dublin through a special air ambulance as his condition deteriorated.
He was admitted at the Escorts hospital here where he breathed last today.
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