How To
So You Want To Be A Full-Time Prospector?
March 2011 by Chris Ralph

Designing and Evaluating Placer Gold Recovery Plants

Hard Rock Milling: A Matter of Scale

How to Interpret Assay Values
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.
Buying a Mining Claim: Questions to Ask

The Heavy Minerals in Your Concentrates

Determining The Optimal Crushing Size for Gravity Recovery
It’s not easy to figure out what is best without testing, and so a certain level of confusion has developed about how small the ore ought to be crushed.
How to Refine Silver—Pt I
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.
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