UK/Germany, 1852: Krantz Collection & Catalogue

In 1852, manufactured Platimum was about 40% more expensive than the same products in Silver.  Also see the 1861 Catalogue by the same firm.

Citation: Die Instrumente und Werkzeuge der höheren und niederen Meßkunst, sowie der ...Carl F. Schneitler (1852) p.371

1852/3: 1 Troy Oz. platina (Germany, ore, retail export)  = £ 0.75  (USD$ 3.68)

1852/3: 1 Troy Ounce Osmium-Iridium (ore, retail)  = £ 0.90  (USD$ 4.40)

Citation: Rheinisches Mineralien-Comptoir: Catalogue of mineralogical, geological, and ... By A. Krantz (1853) p.22

c.1852: where 1" sq. cost ~ £0.03035