1913 : 1 Troy Oz. Iridium (UK mkt) ~ £ 16. - 17 (USD$ 79. - 84.)
Tasmania: Geological Survey Bulletin - Issues 17-20 (1914)
"According to this year's price-lists buyers of fused iridium offer £16 to £17 per oz. The price, however, varies greatly with the quantity offered."
1913: 1 Troy Ounce platina (Colombian ore, intrinsic) ~ £ 8.1 (USD$ 39.45)
Citation: Quito to Bogotá ; Arthur Clifford Veatch (1917)
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