USA, 1912: Ingot & Crucible Prices, Compared

1912: 1 Troy Ounce platina (Urals, source, 83% ore) ~ USD$ 37.05
1912: 1 Troy Oz. platina (SPb, export, 83% ore) ~ USD$ 37.08
1912: 1 Troy Oz. platina (Colombian import, ore) = USD$ 33.07

1912: 1 Troy Ounce Platinum (NY mkt: refined ingot) = USD$ 45.55
1912: 1 Troy Oz. platina (US ore, ~50%) ~ USD$ 21.
1912: 1 Troy Oz. platina (US ore, at purity) = USD$ 41.-42.
1912: 1 Troy Oz. Platinum (Total First Base expense) ~ USD$ 4.50

1912: NY Monthly Mkt Prices for Refined Ingot

1912: Russian Ingot at St. Petersburg and New York, for comparison.



Colombian imported platina, at the intrinsic rate

Citation: The Jewelers' Circular, Vol. 85, Issue 2 (11/1/1922) p.77




US platina sold at intrinsic rate, 

Citation: Minerals Yearbook 1913 p.447


Platinum in jewelry cost more, for the Iridium

 

January, 1912:  Iridium @ $63.


Professor Keller's lecture was delivered in early April, 1912. Ingot Platinum was quoted at this rate March-December. Bishop's correspondence probably includes (January-) March prices.

March, 1912: 1 Troy Ounce Platinum (NY mkt: ingot, 85%) = USD$ 45.50

c. February, 1912: 1 Troy Oz. Platinum (refined, producer) = USD$ 46.65
c. February, 1912: 1 Troy Oz. Platinum (semi-mfg, producer) = USD$ 48.21
c. February, 1912: 1 Troy Oz. Platinum (mfg, producer) = USD$ 52.875

October, 1912: 1 Troy Oz. Platinum (NY mkt: refined ingot) = USD$ 45.50
October, 1912: 1 Troy Oz. Iridium (NY mkt: refined ingot) = USD$ 68. - 70.
  Citation: Engineering and Mining Journal, Vol. 94 (Nov. 12, 1912) p.873
 

October 1912:



Oct/Nov, 1912: 1 Troy Oz. Platinum (NY mkt: refined ingot) = USD$ 45.50
Oct/Nov, 1912: 1 Troy Oz. Platinum (NY: ~4% Ir) = USD$ 48.


Citation: Engineering and Mining Journal, Vol. 94 (1912) p.913