How to Interpret Assay Values
January 2018 by Don Robinson
This assay system of ounces per ton sounds simple enough, but the use of the metric system and the additional measuring terms of “grams per ton” and “parts per million” (ppm) has created some misunderstanding of ore value.
In processing gold, silver and other valuable ores, the minerals containing the values, such as metallic gold, silver-bearing sulfides or other minerals, must be freed from the surrounding host rock before those valuable minerals can be captured.
Our group of independent miners have been busy crafting a uniquely designed ladder/ore cart track from the bottom of an 85-foot mine shaft in a historical hard rock mine.
Last month I wrote an article entitled “Good Assays and Bad,” which gathered a few comments.
Let’s take a look at diamonds and diamond mining and see how they form, how they are used beyond just jewelry, and what leads geologists to find diamond deposits.
The anticipation of finding out if the system of snatch blocks, shackles, chokers, anchor points, and the strap binding the massive slab of rock in the bottom of the river would even budge an inch was weighing on me.
Silver refining has been used from ancient times to change the characteristics of the metal. Early metallurgists refined silver by heating it a couple hundred degrees above its melting point and holding the metal at an elevated temperature for a period of time.
The Bawl Mill • Legislative and Regulatory Update • California: The Land of Big Nuggets—Part II • Bedrock Nugget Hunting: Tools of the Trade • A Primer on Bitcoin and Other Cryptocurrencies • Gold Hunting on Libby Creek • PLP and MMAC Update • Man's Best Friend • An Interview with Minelab Engineer Mark Lawrie • Third Largest Nugget in Existence Returns to Dallas • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices