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Unitedstatesofamerica1

What kind of stone is this?

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Looks to me like some sort of conglomerate.  The older rock looks like it has the quartz nodules and the younger rock is some sort of concretion or limestone building.

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Smash it with a hammer and show a picture of the inside.

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Sample needs a cleaning first using a stiff plastic brush or a brass brush.  Be careful with the yellow mineral.  I see what looks like 3 distinct parts of this sample; the yellow, radiating crystals, the mammalian gray/white material & the "chalky" white area.  Once cleaned, test each part for hardness, streak, fizz test with weak acid or warm vinegar.  Report your findings.

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The "yellow lines" are crystals. I'm thinking aragonite, but I can't tell for sure from the photos. The third photo shows some chalcedony. Both appear to have grown on whatever the host rock is. 

And please, don't smash it as a previous poster suggested. The interesting parts are most likely surface deposits and breaking it open isn't likely to show us anything new.

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Well, having mulled over the photos, here is my best quests with no other info, using one of the photos:

 

 

Raubsville Stone Annotated_20171218b.jpg

Edited by 4meter
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I'm going with a piece of quartz with an overgrowth of iron stained tremolite and containing some spotty mineralization.

Here's a few links that will help you understand the Geology of where your hunting:

Geology Map 

Geology of Northhampton County 1911

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