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Everything posted by d_day

  1. The dark one is a quartz filled agate. Not sure on the light colored one.
  2. Then it’s most likely hematite.
  3. I’m thinking it may be a hematite or limonite after pyrite pseudomorph.
  4. I’m leaning toward it being slag, but it looks like it might be vesicular basalt. Tough to tell from photos.
  5. First impression is basalt, but it is a low quality photo so it’s difficult to say for sure. It does look terrestrial.
  6. I couldn’t tell you what the host rock is, but it looks like it’s been fractured and infilled with agate.
  7. I’m thinking unakite, which is epidote (Green) and plagioclase feldspar (pink). Just a guess based on the photo and the information given.
  8. Interesting. Clay or soapstone perhaps?
  9. I don’t know how accurate this is. There was indeed a Cherokee mine, and many diamonds were found there, but I’ve not been able to verify the rest of the story. Interesting read nonetheless. http://thetombstonenews.com/the-unsolved-mystery-of-californias-idle-diamond-mine-p1576-84.htm
  10. Just looks like a chunk of brown jasper with an agate seam to me.
  11. Looks like quartz to me. Easy test. Calcite has a hardness of 3, Whereas quartz has a hardness off 7. You can scratch calcite with a nail, but not quartz.
  12. A few notes on Kambaba “jasper.” It’s not actually a jasper, nor is it a stromatolite. It’s actually rhyolite. I also just remembered there is a very similar looking stone to what you have there. It was being sold by a few of the vendors at Quartzsite a few years ago. I think they were calling it dragon stone, but I don’t remember for certain. It was quite soft.
  13. Second is certainly quartz. I’d wager the first is serpentine. It does not have the appearance of a stromatolite.
  14. Those marks on the bottom are usually an indicator that the item is cast. Next time you have doubts, use as hot pin or needle instead of an open flame.
  15. I’m 99.99% slag. Outside chance it’s vesicular basalt. Either way It’s nothing special.
  16. My money is on some variety of chalcedony (agate, jasper, chert, etc). The one photo looks somewhat like common opal, but it doesn’t in the other photos.
  17. Looks like banded calcite to me.
  18. Very nice! Edited to add: keep posting! I love seeing what others find. I don’t post much These days because I don’t get out like I used to and my club’s shop is closed due to covid, but if things ever get back to something resembling normal I’ll Be back to posting up stuff I find and stuff I make.
  19. Unfortunately, identifying rocks through photos alone is extremely difficult. There are times where a proper ID is obvious, but that’s extremely rare. that being said, it may well be rhyolite as was suggested earlier. it almost looks like the stuff they give you for fire pits or propane barbecues.
  20. Get your eyes checked Bob! That’s a coffee can!
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