French Delplace Platinum Boiler, £ 3,000.
1887: 1 Troy Ounce platina (Russian export, ~74.8%) = £ 0.8415
1887: 1 Troy Oz Pt (Russian export, .999) = £ 1.125
1887: 1 Troy Oz. Platinum (USA: UK Imp., J-M. Semi-Mfg) = £ 1.40 (USD$ 6.81)
Summer, 1887: 1 Troy Oz. Platinum (USA: Import, Mkt.) = £ 1.545 - £ 1.55
1887: 1 Troy Oz. Platinum (USA: Mkt/Semi-Mfg, Wire) ~ £ 1.606
1887: 1 Troy Ounce Platinum (Semi-Mfg, Trade/Ret.) ~ £ 1.75
1887: 1 Troy Oz. platina (London: Intrinsic, Retail) ~ £ 1.75 - £ 2. (USD$ 8.55 - 9.70)
c. 1886/7: 1 Troy Oz. Platinum (manufactured, retail) ~ £ 1.94 (USD$ 9.44)
Perhaps c. 1886/7? A 'normal price' (UK retail, prior to the rise in 1889) Platinumware cost about 38s./Ozt. or USD$ 9.50/Ozt.
Citation: Report by British Association for the Advancement of Science (1891) p.309
circa 1887, but dubious/dated:
Australia, NSW: Fitfield, Broken Hill platina discovery
Mid 1889 price quote, for refined metal at London:
1887?: 1 Ozt. Platinum (UK, Mkt) = £ 1.40 (USD$ 6.81)
1888: 1 Ozt. Platinum (UK, Mkt) = £ 1.45
Mid-1889: 1 Ozt. Platinum (UK, Mkt) = £ 1.50 (USD$ 7.31)
Citation: Records of the Geological Survey of New South Wales, Volumes 5-6; Geological Survey of New South Wales (1892) p.34
Citation: Annual Report; New South Wales. Dept. of Mines (1890) p.208
Where 1 Troy Ounce of Broken Hill/Fitfield platina was 76.9% Pt, refiners retained (at no cost to them, no benefit to miners) any residual PGM: ~1 gram Ir, 2.3 g Os, 0.4 g Rh. Trade value of PGMs deducts from refiners' cost or adds to profit, accordingly.
Assuming 5% Shipping and £ 0.0625 Refining Cost:
Osmiridium: ?
Iridosmine: 58% Ir, 33.5% Os
Citation: Annual Report; New South Wales. Dept. of Mines 6/25/1891
1920s:
1887: 1 Ozt platina (Ural Spot, .90) = £ 0.80
1887: 1 Ozt Pt (Ural Production Cost) = £ 0.3583
1887: 1 Ozt Pt (Russian export, .999) = £ 0.89
Citation: Minutes of Proceedings of the Institution of Civil Engineers, Vol. 105; Institution of Civil Engineers () p.396
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