A mining company sits on a parcel of Argyle pink diamonds in Australia. The buyer market is global — diamantaires in India, the Far East, Europe, the US. Instead of running ten regional auctions, the consignor decides to bring the entire parcel into India for a single auction event, where invited diamantaires fly in from across the world to inspect and bid.
But here is the part most people miss. Bringing diamonds into India for an auction is not the same as importing them. The goods are not being sold to an Indian buyer at the airport. They are being brought in temporarily, kept under bond, displayed, bid on — and then re-exported back to the mine before any allocation to actual buyers happens.
If the customs treatment is even slightly wrong, the temporary import collapses into a regular import. That triggers full duty exposure on goods that were never sold in India, breaks the temporary structure, and creates a paperwork knot that follows every onward movement. This is why the consignor doesn't pick a regular freight forwarder for an auction movement. They pick a customs and chain-of-custody specialist.