Russia, 1822

1822: 1 Troy Ounce platina (SPb: Ore 80%) = 4.375 руб Acc.

  The first buyer was the government. From the years 1825-1843 the delivery of the whole platinum gained to the Crown was required. The price paid was initially (1822?) 60 Kopecks per Zolotnik, or {140.66 руб Acc.} per kilogram, with 10 to 12% deducted by the assayer {123.78 руб Acc., net}.  Three years (1825?) later, it rose to {230.31 руб Acc.} per kilogram and finally the coining period (1828-1843) to {290.25 руб Acc.}

Citation: Prometheus: Illustrierte Wochenschrift über die Fortschritte..., Vol. 18, No. 904, p.309 

1822: 1 Troy Ounce platina (Error @ "Rouble rate") = £ 0.9042

1822: 1 Troy Oz platina (ore, @ Silver Rouble rate) = £ 0.2260

Citation: The Mineral Industry, Vol. 17 (1908) p.718

1819-22: Platina was separated from Gold at Neiwin ; collected at Jekaterinburg.

1826: Confirmation of the Ural discovery ('rumor') was widely reported in Continental journals of the scientific community; here, a footnote to a Boussingault's 18 April 1826 'Colombian Letter to Humboldt'

Citation: Annales de chimie et de physique; Louis-Bernard Guyton de Morveau, p.206