USA, 1861

1860: 1 Troy Ounce Platinum (Mfg: Crucible) = USD $ 14.40
1860: 1 Troy Oz. Platinum (Semi-Mfg: Foil) = USD $ 12.00
1860: 1 Troy Oz. Platinum (Semi-Mfg: Wire) = USD $ 12.00  
1860: 1 Troy Oz. Platinum (Sponge, Trade) = USD$ 10.

1860: 1 Troy Oz. Platinum (Scrap, Mkt) ~ USD$ 7.25 - 7.66
1860: 1 Troy Oz. Platinum (Mkt) = USD$ 8.

Where Chas. T. Chester sold platinized Silver sheet per Ounce @ $8.00, 1 dozen No. 8 cost $6.80 or $ 0.567 per sheet, or $ 0.2159/per Sq. In.

A No. 8 Gauge Pure Platina Platinized Sheet 2.625 Sq. In. weighed 34 Grains Troy, just 12.95 Grains per Sq. In. (or, 16.935 cm² weighed 2.203 Grams, just 130 Mg per Sq. cm.) 

Hypothetically, a No. 6 Gauge Pure Platina Platinized Sheet (@15 dwt. per dozen) 2.625 Sq. In. weighed 30 Grains Troy, just 11.43 Grains per Sq. In. (or, 16.935 cm² weighed 1.944 Grams, just 114.7869 Mg per Sq. cm.) 

Citation:  Catalogue of Telegraph Material, manufactured by Charles T. & J. N. Chester, 104 Centre Street, New-York. With Appendix. Chester (C. T. and J. N.), Firm. (1861)

No. 56. – Grove Platina Plates: 3.5 in. long, 0.75 in wide (2.625 Sq. In. or 5.25 Sq. In. Surface); rolled to any required gauge or number. No. 8 gives 17 dwt to one dozen pieces; No. 9 gives 18 dwt.; and No. 10 gives 19.5 dwt, etc. No. 6 is as thin as it is ever advisable to roll platina; it is used from No. 6 to No. 30.

No. 56 per Ounce .................................. $8.00

No. 56a Platina Gauge #8 ...................... $1.25
No. 56b Grove Battery Complete ........... $2.50



Where 879 Pounds Avd. is understood to be 12,818.75 Ozt,
 
1861/2: 1 Ozt. Platinum (Plate: Whols., Import.) = $ 5.2797




Where 11 Pounds Avd. is understood to be 160 Ozt,
 
1862: 1 Ozt. Platinum (Plate: Whols., Import.) = $ 5.2488 
 
Where 897 Pounds Avd. is understood to be 13,081 Ozt,
 
1862: 1 Ozt. Platinum (Plate: Whols., Import.) = $ 5.2818

UK, 1896: Numismatic Prices for Pt Roubles

c.1896: 1 Troy Oz. Pt (London Mkt) = £ 1.75 - 2.25 (USD$ 8.56 - 11.)

Citation: Western druggist, Vol. 18 (1896) p.413


1896: 1 Ozt. Platinum (UK: Semi-Mfg) = £ 2.25 (USD$ 10.96)



Where a 3-Platinum coin weighed 10.35 Grams, .975 Pure Pt, the following 'Ask' prices likely exceed numismatic market prices. Avg Numismatic Ask: £ 4.75/Ozt;

3/1896: 1 Ozt. Pt Coin (Numismatic: 12-руб, Au-50) = £ 5.78 (USD$ 28.15)
3/1896: 1 Ozt. Pt Coin (Numismatic: 6-руб, Au-50) = £ 3.85 (USD$ 18.77)
3/1896: 1 Ozt. Pt Coin (Numismatic: 3-руб, MS-70) = £ 4.62 (USD$ 22.50)
  
March 1896:
Citation: The Numismatic Circular, Volumes 2-4 Apr. 1896 p.1654


10/1896: 1 Ozt. Pt Coin (Numismatic: 12-руб, Au-50) = £ 5.0 (USD$ 24.36)
10/1896: 1 Ozt. Pt Coin (Numismatic: 6-руб, Au-50) = £ 3.85 (USD$ 18.77)
10/1896: 1 Ozt. Pt Coin (Numismatic: 3-руб, MS-70) = £ 4.62 (USD$ 22.50)
10/1896: 1 Ozt. Pt Coin (Numismatic: 3-руб, MS-60) = £ 3.47 (USD$ 16.90)

October 1896:
Citation: The Numismatic Circular, Volumes 2-4 Nov. 1896 p.1970



Australia:




Assuming 76.90% Pt ore, w/ 5% Shipping and £ 0.0625 Refining Cost @ London:

1896: 1 Ozt. platina (UK: NSW.769) = £ 1.427
1896: 1 Ozt. platina (UK: NSW.769, net S/H) ~ £ 1.355
1896: 1 Ozt. Pt (UK: NSW.999) = £ 1.763
1896: 1 Ozt. Platinum (UK: NSW.999, net S/H, refined) = £ 1.825

1896: 1 Ozt. Platinum (Producer Cost: NSW Ore, Ref.) ~ £ 1.92


 

UK, 1859

Refiners undoubtedably reaped greater savings with discounted bulk purchases or contract prices far lower than 'common prices.'  In 1859, Platinum still sold at the same 1850 wholesale price, strongly suggesting source- and spot-price stability.

Assuming a Price/Weight set by Specific Gravity of 21.5, a kilogram of Russian scrap, large bulk, cost £ 24.90 -26.00 and sold £ 40., a 62% markup.

1859: 1 Troy Ounce Pt (SPb, Bulk Ore) = £ 0.7737 - £ 0.8086 
1859: 1 Ozt. platina (SPb, Bulk Ore) = £ 0.745 - £ 0.760 

1859: 1 Ozt Platinum (SPb, Bulk Refined) ~ £ 0.9283 - 0.9701
1859: 1 Ozt. Platinum (SPb, Same, Cash-Rate) ~ £ 0.8947 - 0.9127

1859: 1 Ozt. Platinum (UK Mkt: Scrap?) =                          £ 1.25 (USD$ 6.13)
1859: 1 Ozt. Platinum (UK Mkt: Producer?) =                   £ 1.50 (USD$ 7.35)

1859/60: 1 Ozt. Platinum (Intrinsic, Bulk) =                     £ 1.35 (USD$ 6.62)

1859/60: 1 Ozt. Gold (Intrinsic, Common) =                     £ 3.66 (USD$ 17.92)

April 1860: 1 Ozt. Platinum (Refined, Retail) =               £ 1.60 (USD$ 7.11) 

Oct.? 1860: 1 Ozt. Platinum (UK Mkt: Assumed) = £ 1.35 ($ 6.57)

March, 1859: 
1859: 1 Ozt platina (Cartagena Export, 84% ore @ SG 21.5) = £ 0.8653

 
January, 1859:

Citation : The Photographic News; ed. W. Crookes. Vol. 1/7/1859 p.214

 

1859/60: retail price

Citation : The Chemical news, Vols. 1-2 (1860) p.216

a 2"x6" (12 sq. in, 24 sq. in of surface) sheet Platinum cost ~£ 0.35 (~0.22 Ozt) 47% of the Grove-Styled 20-Cell described by Wylde.  Each Cell would presumably hold .6 sq. in. (1.2 sq. in. surface) Platinum, about 5.3 Grains Troy per Cell.

Very Thin Sheets:  ~£ 0.029167 per sq. in. Pt and 54.86 Sq In. Pt (109.71 Sq. In.) per Ozt.  

Citation: The magic of science, a manual of easy scientific experiments; James Wylde (1859)
 

The counterfeit US Eagles of the 1850s were mention  in 1918.

Citation : Mechanics Magazine ; John I Knight, Henry Lacey (1860) p.363

1859: 1 Troy Oz. Chlor-platinate (salt, unknown purity) = £ 1.20 (USD$ 5.88)

Citation: The Photographic Journal, Vol. 5 1859

Weight & Density: Gold, Silver & Platinum

Troy-weight per 1 sq. in. of sheet/plate Au, Ag & Pt