Doughboy Posted July 27, 2011 Share Posted July 27, 2011 I purchased the stone with a bunch of others at a garage sale, I posted it on a different website where I was told it can't be identified with the pictures I provided so I figured maybe someone here can ID it, here is a link with all the info on the rock including picture http://www.mineral-forum.com/message-board/viewtopic.php?t=1844 Link to comment Share on other sites More sharing options...
Brainteaserfan Posted July 28, 2011 Share Posted July 28, 2011 I purchased the stone with a bunch of others at a garage sale, I posted it on a different website where I was told it can't be identified with the pictures I provided so I figured maybe someone here can ID it, here is a link with all the info on the rock including picture http://www.mineral-forum.com/message-board/viewtopic.php?t=1844 The second one looks like slightly dirty quartz to me. http://en.wikipedia.org/wiki/File:QuartzUSGOV.jpg The first, I have no idea on. Link to comment Share on other sites More sharing options...
Realitycheck Posted July 28, 2011 Share Posted July 28, 2011 Looks like limestone, if it is reacting with vinegar, but it also does look somewhat crystalline. The picture is not real clear. Link to comment Share on other sites More sharing options...
Doughboy Posted July 29, 2011 Author Share Posted July 29, 2011 The second one looks like slightly dirty quartz to me. http://en.wikipedia.org/wiki/File:QuartzUSGOV.jpg The first, I have no idea on. They are all the same stone Link to comment Share on other sites More sharing options...
Brainteaserfan Posted July 29, 2011 Share Posted July 29, 2011 They are all the same stone Wow, the lighting must be very different for the two photos. This, "not from the piece in the previous photo but from a different one" is what lead me to believe they were different, sorry. Link to comment Share on other sites More sharing options...
tectobunny Posted August 6, 2011 Share Posted August 6, 2011 Looks to me like a gypsiferous limestone Link to comment Share on other sites More sharing options...
Iggy Posted August 6, 2011 Share Posted August 6, 2011 (edited) it's about 4-5 hardness I would say closer to 4 with a white streak and I would say it has a silky luster to it... If it helps, the stone fizzes a little in vinegar, more like little bubbles come from the stone and I can hear a slight fizzing sound, it doesn't fiz up like vinegar on baking soda in fact it don't foam at all and when removed from the vinegar after being in it for 15 minutes it formed a white film on the surface I also would have guessed limestone... dolomitic limestone (it reacts weakly to acid). Can't really tell from the pic though. ... edit... "dolostone" might turn up a better search than "dolomitic limestone" ...edit... Edited August 6, 2011 by Iggy Link to comment Share on other sites More sharing options...
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