Qala-e-Kohna, as it is known locally, or Lashkari Bazar to archaeologists, is now home to hundreds of refugees fleeing Taliban violence in Helmand province.
The effort will help 36,000 families and will be further extended to more Afghans once additional funds are available.
Based on the accounts of survivors, the migrants were first lashed with wire cables by the Iranian border guards and then forced at gunpoint to jump into the river.
'The story of Pakistan and Afghan refugees is a story of compassion to be celebrated for many reasons,' said UN Secretary-General António Guterres.
The Soviet invasion in 1979, along with more recent violence from the Taliban and ISIS, have forced millions to flee over the border into Pakistan.
The women's handmade jewellery was highlighted at a fashion show in Karachi.
A move by Prime Minister Imran Khan earlier this year to allow Afghan refugees to open bank accounts in Pakistan will help stop illegal money transactions.
Pakistan serves as a model to other countries on how to welcome refugees from war and terrorism.
The gesture of goodwill means refugees can have access to safe money-transaction services.
'Peace is our motive,' said the organiser of the tournament.