UK, c.1852: Palladium Starts to Rise; Other PGMs

c.1851: 1 Troy Ounce Platinum £ 1.50 (USD$ )
1850/1: 1 Ozt. Palladium £ 1.05 - 1.25 (USD$ 5.16 - 6.14) 
1854:  1 Ozt. Palladium £ 1.50 (USD$ 7.32) 

Citation: Gold-mining and assaying: a scientific guide for Australian emigrants By John Arthur Phillips (1852)
 

Citation: The People's medical journal, and family physician, Volumes 1-4 (1851) p.160

c. 1850 and 1862:

Citation: Metallurgy: the art of extracting metals from their ores, Vol. 2, By John Percy (1864) p.

The price for platina gains suitable to the pen-trade  (whether sold as Osmium, Iridium or Rhodium) varied widely from the 1830s - 1850s.

c.1851: 1 Ozt. Iridium ('Better' Ore: Whols.) = £ 6. - 8.  (USD$ 29.45 - 39.28)

Citation: Records of the School of Mines and of science applied to the arts By Royal School of Mines (GB) 1852, p.143

c. 1851

c.1852:  British companies buying up Gold & platina mines.