The "Mint State" Americana & Numismatics Auction (2025 May)

This pp.45 booklet offered by the John Taylor & Co. includes the tables for silver assay values. It is listed at their new (1894) Mission St. ad...

This receipt written by P.L.Parker for bullion deposited at the San Francisco Assaying and Refining Works on Jan. 7, 1867. Deposit #3874 for 27.03 oz.

This booklet is the Gold and Silver Tables for the San Francisco Assaying and Refining Works Co. formerly Kellogg, Hewston & Co. The booklet is ...

This invoice is to The Bullion & Exchange Bank bought from Justinian Caire Hardware and Fancy Articles dated 1883. The invoice is for extensive ...

A dozen receipts of bullion deposits from the Manhattan Mine in Knoxville, California. Owned by San Francisco businessman, R.B. Knox. it was involved

There are three gold dust receipts from Forest Hill, Moore's Flat, and North San Juan dated between 1860 and 1866. These were: Banking House of ...

Rare assay report from MIT for A(lexander) Agassiz, son of famous 19th century geologist Louis Agassiz. This assay was for a sample of gravel weighing

A rare assay document from J.R. Murphy the office of the First National Bank of Nevada, Austin dated May 17, 1867. The assay is of mill pulp deposited

This 1867 assay receipt is from the office of David Lundbom dating February 9, 1867; his office was based in Austin, Nevada. This is the assay receipt

Extremely rare. We have offered receipts from his Austin, NV office but not this office in Eureka. Deposit by John Perry on April 3rd, 1874. Valued at

Lot of 3. The Gold Hill Assay office was founded by Conrad Wiegand, passed onto Dowling, back to Wiegand's son, and then sold to W.S. James. 1) ...

There is one assay receipt for the Florence Mine in Goldfield that reveals a concentration of 5.98 oz. of gold per ton or about $20,000 per ton in tod

Lot of three assay maps for the Elko Prince Mine of Midas, Nevada. Assay points taken throughout 1913-34. Shows 300, 450, 600, and 750' levels. ...

Assayer sample bags (2). One that measures 5"x 11", is labeled R.H. Frazer Chemist and Assayer, 117 E. Second Street Reno, Nevada, while t...

This assay for the Tonopah Extension Mining Co. is for both gold and silver. There are 14 samples of both gold and silver. Very high grade ore listed.

This is an ore sampling from the Consolidated California and Virginia Mining Co. mining company; the largest producer of gold in the Comstock District

This assay #9696 from the office of E. Ruhling & Co. of Virginia, Nevada for the Savage Mine Co.(Pappoose Mill) dated 1871. The total value is $...

These two assay documents are from the Comstock mines. The Chollar and Potosi Assay Office processed gold and silver for the Savage Mining Co. on Janu

This document details the cost savings and improved ore extraction by Edward N. Kent a chemist and superintendent at the United States Assay Office in

There is an assay receipt from the Assay Office of J.R. Reedy of Central City, Col. dated May 14, 1891. It shows 14 oz. of gold, and 124 oz. of silver