darren1408 Posted August 13, 2008 Share Posted August 13, 2008 Hi, Here are some stones I found on the Jurassic Coast, Dorset. They have Crystals inside (I think!), I dont know what particular ones though. Here are some pictures: Thank you for help in advance. Darren. Link to comment Share on other sites More sharing options...
ebrocklds Posted August 13, 2008 Share Posted August 13, 2008 looks like calcite. nice rocks brock Link to comment Share on other sites More sharing options...
Guest N.AL.hunter Posted August 13, 2008 Share Posted August 13, 2008 To see if calcite vs quartz, take a small amount of vinegar and put it on the least valuable specimen's crystals. If it fizzes, it is calcite, if not, it could be quartz. Link to comment Share on other sites More sharing options...
Auspex Posted August 13, 2008 Share Posted August 13, 2008 Pretty little nodules! "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease! Link to comment Share on other sites More sharing options...
darren1408 Posted August 13, 2008 Author Share Posted August 13, 2008 Hi, I tried the Vinegar, and there were no bubbles. Thanks for the test! Darren. Link to comment Share on other sites More sharing options...
Bill Posted August 13, 2008 Share Posted August 13, 2008 Hi Darren, Baryte crystals can be found in certain places on the Dorset coast too. They would not fizz either. Gypsum can also be found, this does not fizz either. KOF, Bill. Welcome to the forum, all new members www.ukfossils check it out. Link to comment Share on other sites More sharing options...
Maryland Mike Posted August 14, 2008 Share Posted August 14, 2008 A hardness test should help to distinguish which of those it might be. If you can scratch one of the crystals with a pocket knife then it is definitely not quartz. Carpe Diem, Carpe Somnium Link to comment Share on other sites More sharing options...
Guest solius symbiosus Posted August 14, 2008 Share Posted August 14, 2008 Calcite, barite, and gypsum will scratch with a copper penny. I'm thinking quartz. I think that I see both, hexagonal and rhomb xls. Too, those other minerals weather easily, and that piece looks weathered. Link to comment Share on other sites More sharing options...
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