Colombia, 1874

Where 8 pkgs = 40 kgs = 1,286 Ozt., 1 Kilogram Pt cost C$ 137.35 ($ 125.26/ USD$ 139.30) plus any transport &refining costs.

Refining, 1 Kg Pt: C$ 17.27 ; $ 15.75/ USD$ 17.52

1874: 1 Troy Ounce platina (Export ~83% Ore) = C$ 3.546 ($ 3.234/ USD$ 3.60)
1874: 1 Troy Oz. Pt (Export, .999) = C$ 4.272 ($ 3.90/ USD$ 4.33)

Citation: House Documents, Otherwise Publ. as Executive Documents: 13th Congress, 2nd Sess. H. Ex. 157-19 (1875)