A rock recast from itself

Katie Paterson’s work Campo del Cielo, Field of Sky is described on her website as ‘a meteorite, which has travelled through space and time for over 4.5 billion years, was cast, melted, and then recast back into a new version of itself, replicating its original form. The meteorite was later returned to space by the European Space Agency’.20

Unlike Quinn’s Self where the material used is a sample from the material of the referent, here the referent is used, materially, in its entirety. To make the indexical object required the complete destruction of the referent itself. But - as an exact copy (in both form and material) - can we distinguish between the thing that Paterson sent back into space and the thing she dug from a crater in Mexico. Is Campo del Cielo at once both index and referent?