UK, 1893: Grove' Battery Cells, Cost

Chicago Exhibition, c. August 1893:

August 1893: 1 Troy Ounce Palladium (producer's price) = £ 7.0
August 1893: 1 Troy Oz. Iridium (producer's price) = £ 6.25

  Citation: The Chemical news and journal of industrial science; Vol. 67, No. 1765 ; William Crookes (Sept 23, 1893) p.161


c.1893: 1 Troy Oz. Platinum (semi-mfg, wholesale) = £ 1.40  (USD$ 6.80)
c.1893: 1 Troy Oz. Platinum (BUY: scrap) = £ 1.20 (USD$ 5.83)
 



mid-1893 :1 Troy Oz. Platinum (refined, retail) = £ 2.75 (USD$ 13.37) 

Citation: Work: the illustrated weekly journal for mechanics, Volume 6 (1893) p.107


c. 1894 :1 Troy Oz. Platinum (refined, retail) = £ 2.50 (USD$ 12.15)

Citation: Elementary lessons in magnetism; William Jerome Harrison (1895) p.37

1893 :1 Troy Oz. Platinum (mkt) = £ 1.50 - 2. (USD$ 7.29 - 9.72)