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Identity HelpWhat is this yellow heavy thing???

12th Dec 2018 07:01 UTCNoah Yuen

00194060016046733233119.jpg
Found in northern California near Sacramento river. Very very heavy dull yellow Stone found in old ancient dried up river bed. Non magnetic. Is this gold or is there gold in this??

05398230015652497977347.jpg

04580810015652497981880.jpg

12th Dec 2018 11:38 UTCReiner Mielke Expert

Looks like limestone to me.

12th Dec 2018 12:13 UTCNoah Yuen

Limestone awesome thank you ill learn about that.

12th Dec 2018 12:29 UTCNoah Yuen

09615400016046733243474.jpg
this piece broke off of it and it weighs 50grams if that helps identifying it

12th Dec 2018 12:36 UTCNoah Yuen

06743130016046733259542.jpg

12th Dec 2018 13:51 UTCUwe Kolitsch Manager

Jarosite? Is it soft?

12th Dec 2018 15:10 UTCNoah Yuen

Yes it is very soft

12th Dec 2018 16:28 UTCUwe Kolitsch Manager

These are two examples of a typical massive (finely crystalline) jarosite:

https://www.mindat.org/photo-93065.html

https://www.mindat.org/photo-405924.html

12th Dec 2018 18:47 UTCKevin Conroy Manager

To help narrow the idenitification down, please test to see if this is limestone. If you have some muriatic acid (dilute hydrochloric acid) put a drop of it on the stone. If you don't have this acid a large drop of vinegar will also work. Limestone is largely composed of calcium carbonate minerals, and bubbles will form when incontact with vinegar or muriatic acid. The reation will be more noticable if the stone and solution aren't cold.
 
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