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New here, help identify this please!

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On 4/12/2022 at 10:41 PM, Buggutts said:

From new mexico near the texas border between Carlsbad and El Paso. Black and copper ish looking brown, shiny, heavy, smooth on all sides but one...makes brown streak on porcelain...


With the pictures and information you've stated, the only mineral off the top of my head that comes close to your description is hematite but that usually streaks a reddish brown. That's just a guess.

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  • 4 weeks later...

Weather worn basalt, some with cross sections showing the vents hot gasses escaped from as it cooled.  I think this type of basalt is called vesicular basalt.

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