I thought Thanos already had one? Wod that not be the Soul stone?
was the one he had not the one he gave to Loki in the Avengers (in the staff) that ends up in Visions' head
and referring back to my comment earlier on whether there was 2 gauntlets..wiki has this to say
A right-handed gauntlet appears in the film Thor, where it is stored in Odin's vault.[53] In the mid-credits scene of Avengers: Age of Ultron, Thanos is seen wearing a left-handed gauntlet.[64
bold is my emphasis