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MINERAL OF THE MONTH

June 2007: Lake Superior Michipicoten Agate

The mineral of the month is a Lake Superior Michipicoten agate. When a newspaper article was published in 1958 featuring the museum founder, Axel Niemi, and his 5.5 pound agate, Axel received a letter from Mrs. J. Oldenkomp. She had seen the article and asked Axel if he was interested in buying an agate that she inherited from her grandfather. Apparently, he had found the agate on Michipicoten Island, located in the northeast part of Lake Superior. As was common practice back then, he had the agate cut and polished. The lapidariest received half the agate in payment, and the Oldenkomp family kept the other half. Before cutting, the agate weighed over 8 pounds!

Axel and Mrs. Oldenkomp haggled over the price of the agate for 7 years before Axel finally purchased the specimen in 1965. The letters documenting this purchase are posted in the museum. Unfortunately, Axel cut out the price in the letter so we’ll never know how much he paid for this beauty.

Michipicoten Agate

Mineral of the Month Archives

May 2007: Rainbow Fluorite

June 2007: Lake Superior Michipicoten Agate

July 2007: Labadorite

August 2007: Rain Flower Agate

Fall 2007: Malachite

December 2007: Nepheline Syenite

January 2008: Native Copper

February 2008: Amazonite

June 2012: Moqui Marbles

March 2008: Lake Superior Agate

April 2008: Shadow Agate

May 2008: Apohpylite

June 2008: Ocean Jasper

Summer 2008: Marra Mamba Tiger's Eye

September 2008: Mohawkite

October 2008: Mexican opal

November 2008: Prehnite

December 2008: Picture Jasper

January 2009: Sea Shell Jasper

February 2009: Polychrome Jasper

March 2009: Selenite Desert Rose

Spring 2009: Coyamito Agate

July 2009: Obsidian Needles

August 2009: Goethite

September 2009: Banded Iron Formation

Fall 2009: Fairburn Agate

March 2010: Fossilized Dinosaur Bone

April/May: 2010 Kentucky Agate

June 2010: Nantan Meteorite

July 2010: Mookaite Jasper

Aug/Sept 2010: Polyhedroid Agate

Fall 2010: Ammonite Fossil

Winter 2011: Argentina Condor Agate

Spring 2011: Petrfied Wood

September 2011: Petoskey Stones

January 2012: Mary Ellen Jasper

March 2012: Mexican Crazy Lace Agate

September 2012: Chlorastrolite Greenstone

March 2013: Jacobsville Sandstone

August 2013: Unakite

November 2013: Skip-an-Atom Agate

April 2014: Tiger's Eye

September 2014: Black Corundum

February 2015: Condor Agate

June 2015: Petoskey Stone

November 2015: Slag

June 2016: Lake Superior Copper Replacement Agates

August 2016: Puddingstone


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Gitche Gumee Museum.
E21739 Brazel Street
Grand Marais, Michigan 49839

 


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