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Con Virginia Assay Book, 1878 [131076]

Currency:USD Category:Collectibles / Mining Start Price:1,500.00 USD Estimated At:3,000.00 - 5,000.00 USD
Con Virginia Assay Book, 1878  [131076]
SOLD
1,500.00USD+ (375.00) buyer's premium + applicable fees & taxes.
This item SOLD at 2021 Feb 11 @ 15:27UTC-8 : PST/AKDT
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298 pages, with only the last page cut out. This book is a spectacular record of assays taken by and for the Con-Virginia Mining Co, one of the two largest gold-silver producing companies on the Comstock, and in the world at this time. It shows samples received from various mills, such as the Woodbury, Omega, Mariposa and more. Perhaps more importantly, it shows how careful the mill managers were in looking at every geochem detail, such as mill slimes, sluice, sand, sulphurets assays, which help tell the company how the process are doing- are they getting all the gold? Are they losing it somewhere in the system? They also received samples from Conrad Weigand's refinery. A number of pages show high quality ores samples, $46.20/t gold and $80.30/ton silver (p90, October 11, 1878). This was equivalent to about 2.2 ounces per ton gold and 80 ounces per ton silver, worth more than $5,000 per ton at today's prices. (Think "Bonanza" ores!). Where has this book been all these years? This is a very important record of actual sample data - not the data printed in the newspapers, but in the company's own records. It comes just a couple years after the "Big Bonanza" of the earlier 1870s. The Con-Virginia produced over $63 million in its lifetime.

Date:
Country (if not USA):
State: Nevada
City: Virginia City
Provenance: