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About Us - Our Writer

Dr. Ralph E. Pray

Senior Writer (retired)

Dr. Ralph E. Pray was the owner and operator of the Mineral Research Laboratory in Monrovia, California.  He passed away in May, 2014.
Read Articles by Dr. Ralph E. Pray
Successful Mineral Property Promotion

Desert Bonanza

Pullin' the Pin

Small Mine Selective Blasting

Evaluating a Placer Discovery

Placer Testing with Large Samples

The Trapiches of Chile

Fake Assays & Assayers

The Furnace Atmosphere During the Fire Assay

Picks & Pans: How to Succeed in a Small Mine, A Case History: 1990-2000

A Silver Opportunity

The Manson Mine

The First Prospectors

Picks & Pans: Mining Tungsten Ore—A Case History

The Fire Assay of Fly Eyes

Gold Garbage: Scams New & Old

A Unique Prospecting Method

Prospecting for Iron in Alaska

The Old Dutch Cleanser Mine

A Working Arrastra

Dredging Below the Homestake

Our Readers Say

The First Mine in America

How to Prospect for Silver Field Tests You Can Use to Detect the Hidden Metal

Prospectors Beat Mining Claim Tax


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