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Agate, Copper  Wolverine No. 2 shaft, Wolverine Mine, Wolverine, Houghton Co., Michigan, USA

Agate, CopperWolverine No. 2 shaft, Wolverine Mine, Wolverine, Houghton Co…

Greenstone -- Michigan's state gem, the greenstone, was formed in gas bubbles within basalt. Basalt is a volcanic rock, formed in Michigan in part during the Midcontinent Rift approximately one billion years ago.    As the Earth's crust separated, magma welled up from beneath the crust. Rocks formed from this magma gave Michigan its valuable deposits of copper and silver -- and its state gem.

Greenstone -- (Michigans state gem) was formed in gas bubbles within basalt. Basalt is a volcanic rock, formed in Michigan in part during the Midcontinent Rift approximately one billion years ago. It is found more in the western Upper Peninsula, MI, USA

Agate, Copper  Wolverine No. 2 shaft, Wolverine Mine, Wolverine, Houghton Co., Michigan, USA

Agate, Copper Wolverine No. 2 shaft, Wolverine Mine, Wolverine, Houghton Co., Michigan, USA

Agate, Copper Wolverine No. 2 shaft, Wolverine Mine, Wolverine, Houghton Co., Michigan, USA

Agate, Copper Wolverine No. 2 shaft, Wolverine Mine, Wolverine, Houghton Co., Michigan, USA

Agate with Copper and Chalcotrichite The striking feature of this copper agate is the large reddish area on the lower left. You are looking through very clear calcite to the backside of the agate whose inner surface is covered with the reddish copper mineral Chalcotrichite. The milky white is Chalcedony.

Agate with Copper and Chalcotrichite The striking feature of this copper agate is the large reddish area on the lower left. You are looking through very clear calcite to the backside of the agate.

Laguna Lace Agate

Laguna Lace Agate Nice pattern running in an S also the colors of brown and green like the earth.

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