Jawsaw225 Posted March 25 Share Posted March 25 Found this in Coalinga, California. I haven’t been able to find anything to help identify it. Feels like glass but doesn’t look like it. 1 Link to comment Share on other sites More sharing options...
Darktooth Posted March 25 Share Posted March 25 Possibly some kind of mineral but not sure what exactly. Looks cool though. Hopefully some of the mineral experts will chime in. @ynot @FranzBernhard 1 I like Trilo-butts and I cannot lie. Link to comment Share on other sites More sharing options...
Jawsaw225 Posted March 25 Author Share Posted March 25 Yea I looked all over to figure it out brings up meteorites when I image searched it Link to comment Share on other sites More sharing options...
Ludwigia Posted March 25 Share Posted March 25 The first one looks like some kind of mineral in botroyoidal form. Maybe hematite? The second appears to be a pebble with mineral veins, maybe calcite or quartz. 2 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
FranzBernhard Posted March 25 Share Posted March 25 You would like to perform a streak test on the first one. Hematite, "Limonit", mangenese oxides are some of the possibilities. Franz Bernhard Link to comment Share on other sites More sharing options...
Jawsaw225 Posted March 25 Author Share Posted March 25 What’s the best way to do streak test? Also the color is a very blue color Link to comment Share on other sites More sharing options...
Jawsaw225 Posted March 25 Author Share Posted March 25 Link to comment Share on other sites More sharing options...
FranzBernhard Posted March 25 Share Posted March 25 (edited) Streak test: Rub the edge of the specimen on the underside rim of a porcelain coffee cup or something similar. You can also use the underside of a porcelain toilet tank cover. Another question: Is it lightweight, normal or heavy in comparison with a normal rock? Yeah, that blueish tinge is a little bit strange. Franz Bernhard Edited March 25 by FranzBernhard Link to comment Share on other sites More sharing options...
Jawsaw225 Posted March 25 Author Share Posted March 25 It’s not crazy heavy but not super light either 1 Link to comment Share on other sites More sharing options...
Darktooth Posted March 25 Share Posted March 25 Really looks like azurite to me. I like Trilo-butts and I cannot lie. Link to comment Share on other sites More sharing options...
ynot Posted March 25 Share Posted March 25 Coalinga is a 3 to 5 million year old bay deposit that is rich in oil and sand dollars, but not copper. The piece in question is most likely hematite. Blue is probably just an oxidized surface coating. The streak test needs an unglazed porcelain like the underside of a toilet lid. 1 Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
ezeemonee Posted April 4 Share Posted April 4 On 3/24/2024 at 7:02 PM, Jawsaw225 said: Found this in Coalinga, California. I haven’t been able to find anything to help identify it. Feels like glass but doesn’t look like it. That blue one might be an interesting mineral formation but not sure if its actually a fossil. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now