Shimmering, rough, rock. Need help identifying.

ReekDaddy

Newbie
Apr 21, 2022
1
3
Hi! We are trying to figure out what type of rock this is. Any ideas would be greatly appreciated.

The rock is very shimmery and the photos don’t do it justice.
Extremely rough.
Not magnetic.
The rock itself is a black, grey, green color with many sparkles.

Found near the American River in Sacramento, CA. The area along the River is covered in rocks but we did not find any other rocks like this one.
We cleaned it but it still has red mud imbedded in it from the river.

Measurements: 2”1/16 x 1”7/16, 1” thick
Weight: 71.8 grams

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0D8CC7C4-0DB9-4E33-82E5-422AC4DD0F09.jpeg

0E48D8BC-94CB-4392-9FE2-3477592538C6.jpeg
 

blauer

Full Member
Jun 17, 2014
209
251
Pennsyltucky
Detector(s) used
Elena. She is a Bounty Hunter Quick Draw II.
Primary Interest:
Other
Hi! We are trying to figure out what type of rock this is. Any ideas would be greatly appreciated.

The rock is very shimmery and the photos don’t do it justice.
Extremely rough.
Not magnetic.
The rock itself is a black, grey, green color with many sparkles.

Found near the American River in Sacramento, CA. The area along the River is covered in rocks but we did not find any other rocks like this one.
We cleaned it but it still has red mud imbedded in it from the river.

Measurements: 2”1/16 x 1”7/16, 1” thick
Weight: 71.8 grams

View attachment 2022358

Hi! We are trying to figure out what type of rock this is. Any ideas would be greatly appreciated.

The rock is very shimmery and the photos don’t do it justice.
Extremely rough.
Not magnetic.
The rock itself is a black, grey, green color with many sparkles.

Found near the American River in Sacramento, CA. The area along the River is covered in rocks but we did not find any other rocks like this one.
We cleaned it but it still has red mud imbedded in it from the river.

Measurements: 2”1/16 x 1”7/16, 1” thick
Weight: 71.8 grams

View attachment 2022358 View attachment 2022359
View attachment 2022360

It looks to me like a conglomerate or breccia. I would start there.
 
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