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History & Geology

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Geology and stories from the past

Are There Tertiary Channels in the Eastern U.S. Gold Belts??

Metamorphic Greenstone Gold

Gold Prospecting With LiDar

LiDAR Opens a New Window to the Earth

Home of the Original Gold Claimer

ICMJ Visits Sumpter Oregon, Gold Mining Town

Finding Gold - Fact vs Fiction

Truths and myths about finding Gold

ICMJ Visits Downieville, California

Custom fabrication of Lode & Placer Mining Equipment - See Website for Details!

ICMJ Visits Colfax, California

ICMJ Visits Virginia City, Nevada

Connecting With The Past With Gold Rush Coins

Serving Professional and Recreational Prospectors since 1979

Formation of Gold Deposits in the South Eastern United States

ICMJ Visits the Ghost Town of Bodie, California

ICMJ Visits Sonora, CA

Full line of prospecting and mining equipment & supplies with NO sales tax!

The Rich Mining History of Two Mother-Load Towns

ICMJ Visits Grass Valley, California

March 2023

Quartz: The Indicator of Gold

Quartz: The Indicator of Gold

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The Forms of Crystalline Gold

The largest and most perfect single gold crystals are nearly always in the form of octahedra. These large octahedral crystals often possess deeply recessed faces.

The History of Mining Claims

Congress decided that if they shared the riches of our lands with the people, we would colonize and expand the states at a much faster pace, thus the birth of public lands and mining claims in America.

Gold: Is It Everywhere?

Gold, on the other hand, is super rare, and is one of the rarest elements in the earth’s crust. It averages only 0.000004 percent of the earth’s surface. That is four parts in a billion.


Blast from the Past: Jeff Casserly Tells His Own Story

I have been finding nuggets all my life, beginning in Sierra County 50 years ago, and believe me they don’t pop up out of the ground like mushrooms when they see me coming and say, “Here I am and take me home.”

Crystallized Gold Mines of California

Gold specimens that include visible crystal formations are among the rarest, most attractive and most valuable forms of gold to be found.


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