Is this just a rock or Indian made?

Roger Mn.

Silver Member
Aug 18, 2007
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Rochester,Minnesota
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Detector(s) used
Minelab Etrac
Primary Interest:
Metal Detecting

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No not Quartz I agree Roger.
It's possible it may be Basalt.

BASALT (buh-salt')
What Type of Rock Is It? Igneous

What Does It Look Like? Basalt is dark gray to black. When exposed to the weather, it may turn yellow or brown on its surface.

How Was It Formed? Basalt is a volcanic rock. It is formed from a magma that is rich in iron and magnesium, and poor in silica (quartz). The magma erupts from a volcano or a fissure (a crack in the earth's surface) as lava. Because the lava cools rather quickly, basalt is fine grained. there is not time enough for the grains to become larger.

This is one of my favorite rock references

http://www.rockhounds.com/rockshop/rockkey/index.html
 

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4-H said:
No not Quartz I agree Roger.
It's possible it may be Basalt. :dontknow:

BASALT (buh-salt')
What Type of Rock Is It? Igneous

What Does It Look Like? Basalt is dark gray to black. When exposed to the weather, it may turn yellow or brown on its surface.

How Was It Formed? Basalt is a volcanic rock. It is formed from a magma that is rich in iron and magnesium, and poor in silica (quartz). The magma erupts from a volcano or a fissure (a crack in the earth's surface) as lava. Because the lava cools rather quickly, basalt is fine grained. there is not time enough for the grains to become larger.

This is one of my favorite rock references

http://www.rockhounds.com/rockshop/rockkey/index.html
I think 4-H has your best answer! :thumbsup: I find them here on the coast mainly around old colonial home sites or ballast rock piles.All have been found here this way so I would think they came from other places and hauled here.But being from underwater volcano's it's possible I guess that they are just old and have always been here.Might be plenty to find after this hurricane Earl is done with us. :D :-\
Take Care,
Pete :hello:
 

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4-H said:
No not Quartz I agree Roger.
It's possible it may be Basalt.

BASALT (buh-salt')
What Type of Rock Is It? Igneous

What Does It Look Like? Basalt is dark gray to black. When exposed to the weather, it may turn yellow or brown on its surface.

How Was It Formed? Basalt is a volcanic rock. It is formed from a magma that is rich in iron and magnesium, and poor in silica (quartz). The magma erupts from a volcano or a fissure (a crack in the earth's surface) as lava. Because the lava cools rather quickly, basalt is fine grained. there is not time enough for the grains to become larger.

This is one of my favorite rock references

http://www.rockhounds.com/rockshop/rockkey/index.html
I would say you have it 4-H. I Read some from the web site. Dark green with pieces of quartz and silica sand.The quartz pieces vary in size. I could go nuts reading about rocks. At least we know it wasn't man made and is just a rock. Thanks.
 

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