Idriss Posted February 16 Share Posted February 16 Quote Link to comment Share on other sites More sharing options...
Morlock Posted February 16 Share Posted February 16 It could be either quartz or calcite. Put some warm vinegar on it to see if you get a slow fizz after a few minutes. If you do..it's calcite. If not..it's quartz. Quote Link to comment Share on other sites More sharing options...
Idriss Posted February 16 Author Share Posted February 16 2 hours ago, Morlock said: It could be either quartz or calcite. Put some warm vinegar on it to see if you get a slow fizz after a few minutes. If you do..it's calcite. If not..it's quartz. Thank you sir. Quote Link to comment Share on other sites More sharing options...
BobAK Posted February 18 Share Posted February 18 almost looks like prehnite crystals 1 Quote Link to comment Share on other sites More sharing options...
RockandFound Posted March 1 Share Posted March 1 Looks like botryoidal aqua chalcedony to me Quote Link to comment Share on other sites More sharing options...
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