Bkm911 0 Posted December 4, 2018 Share Posted December 4, 2018 Quote Link to post Share on other sites
Bkm911 0 Posted December 4, 2018 Author Share Posted December 4, 2018 Quote Link to post Share on other sites
Saul R W 741 Posted December 4, 2018 Share Posted December 4, 2018 (edited) In which state or region was it found? It looks suspiciously like the calcite with which my Ozarks driveway was paved, only bigger and more noduley. Then again, I'm partially colorblind, so might be missing an obvious clue as to ID. Edited December 4, 2018 by Saul R W I could be wrong, as always. Quote Link to post Share on other sites
homefire 2,581 Posted December 4, 2018 Share Posted December 4, 2018 Fish Tank Bound it should be. Have fun keeping the Alga From infesting it. My bet is it would look nice under some black light. Fresh or Salt Tank. Salt tank it may go away sooner then in a Fresh tank. Your fish may even eat at it. Quote Link to post Share on other sites
Morlock 1,728 Posted December 5, 2018 Share Posted December 5, 2018 (edited) Put a few drops of vinegar on it and let it sit for 20 minutes. If it fizzes slowly, it's calcite. If it doesn't, it's quartz. Edited December 5, 2018 by Morlock Quote Link to post Share on other sites
Roger P 4 Posted December 5, 2018 Share Posted December 5, 2018 If the dark areas are metallic be very cautious in an aquarium. Roger Quote Link to post Share on other sites
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