Help Identifying this rock

crystalraye0379

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May 4, 2018
33
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Colorado
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Found this in Colorado Near Minturn. Very heavy and hard to break with hammer. I did get a little chunk off and that’s where the reddish part is with glistening. I am new to this so if there is anything else you need to know to help identify please let me know. Thanks. ImageUploadedByTreasureNet.com1525518857.576209.jpg ImageUploadedByTreasureNet.com1525518867.541388.jpg ImageUploadedByTreasureNet.com1525518877.338165.jpg ImageUploadedByTreasureNet.com1525518886.242234.jpg ImageUploadedByTreasureNet.com1525518894.739085.jpg ImageUploadedByTreasureNet.com1525518903.968366.jpg ImageUploadedByTreasureNet.com1525518912.706162.jpg ImageUploadedByTreasureNet.com1525518921.952035.jpg ImageUploadedByTreasureNet.com1525518931.705710.jpg ImageUploadedByTreasureNet.com1525518942.521016.jpg ImageUploadedByTreasureNet.com1525518950.940559.jpg ImageUploadedByTreasureNet.com1525518981.574111.jpg ImageUploadedByTreasureNet.com1525518997.857880.jpg ImageUploadedByTreasureNet.com1525519008.137634.jpg
 

DDancer

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Mar 25, 2014
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I suggest a streak test to confirm however it appears you have a pyrite specimen there. Good find. When you test it have a smell of the streak and see if you smell sulfur, smell of burnt matches, that will also help define whether its an arsenopyrite.
 

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Mine Shaft

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Apr 11, 2017
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I have found stones that look like yours, mine is heavily magnetic. Dose iron ore have pyrite in it ?
 

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DDancer

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Mar 25, 2014
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Pyrite is a sulfide of iron so yes iron ore is a derivative and mixed specimens can be magnetic. The iron usually takes the form of magnetite.
 

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Mine Shaft

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Second Question. Why would they mix this type of materiel with "asphalt" ? I was camping one time up in the sierras and noticed something shiny at the edge of the road picked it up and this is what i found. The road was loaded with this Iron Ore stuff.
 

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Eu_citzen

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Sep 19, 2006
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Second Question. Why would they mix this type of materiel with "asphalt" ? I was camping one time up in the sierras and noticed something shiny at the edge of the road picked it up and this is what i found. The road was loaded with this Iron Ore stuff.

Simple. Because it came from the quarry with the other rocks for the asphalt. More accidental then any reason.
 

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DDancer

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One can find many rocks and minerals in concrete, asphalt and other building materials. One member here showed off a nice agate he dug outta his driveway and people have picked gold nuggets in others. :) I recently picked up some pyrite and tourmaline bits in the gravel foundation material of the new building I work out of that was dug from a granite quarry.
 

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hvacker

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Aug 18, 2012
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I once thought crushed glass would be a good addition for asphalt. There are mountains of the stuff but someone told me they did that but it made the road too slippery.
 

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IAMZIM

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Apr 23, 2011
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I've found gold in a bag of gravel from Home Depot. The highway dept. and gravel plants end up with all kinds of minerals depending on where they are gathering their material from. I myself have found fossils in asphalt in my uncle's driveway, because of where the material the asphalt plant came from, it was loaded with them!
 

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