Police say a French mountain climber stumbled upon a case of dozens of cut jewels, worth hundreds of thousands of dollars — believed to be debris from one of two Air India crashes decades ago.

Police commander Sylvain Merly said the Mont Blanc climber, who asked to stay anonymous, turned in the box marked “Made in India” on Sept. 9. Authorities hope to find someone connected with its owner, who is presumed to have been a passenger on one of the two jets that crashed in 1950 or 1966.

Merly said Thursday the metal box, slightly smaller than a shoe box, was filled with small bags of loose jewels, mostly emeralds and sapphires. Merly said debris from the Air India crashes regularly rises to the surface on Mont Blanc’s glaciers.