A 46-kilogram touchstone was recovered from a graveyard in Ghoraghat upazila in the district on Saturday morning.
Locals said they spotted the touchstone while leveling earth at the graveyard in Kuchpara village under union No.3 of the upazila.
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Asim Kumar Jadhav, sub inspector of Ghoraghat police station, said on information they recovered the touchstone.
The stone will be examined, he added.