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enter image description here What is this I found this in my back yard im unsure as to what it is and would really like to know.

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    $\begingroup$ Welcome to Earth Science S.E, interesting rock! Have a look at these instructions. With more information, we will be able to provide better help. $\endgroup$ – Tactopoda Feb 22 '17 at 8:47
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    $\begingroup$ And add better pictures please. You can see for yourself that the focus is on the towel just in front of the sample, not on the sample itself. Photograph in daylight out of direct sunlight (it looks like you did). You do not have enough reputation to insert multiple pictures, so just put them on a generic hosting site and put the links in. Finally, are we supposed to know where your backyard is? You should always reread your questions judging if they are good enough. Don't post half-questions. $\endgroup$ – Jan Doggen Feb 22 '17 at 10:22
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    $\begingroup$ Please provide a location city, state/province, and country would help. $\endgroup$ – Gary Kindel Feb 22 '17 at 12:18
  • $\begingroup$ Melbourne Australia $\endgroup$ – Steph Feb 23 '17 at 0:46
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    $\begingroup$ You really should upload a better photo, at the very least. $\endgroup$ – Knob Scratcher Feb 24 '17 at 2:13
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Most likely gypsum or quartzite. Based on its white semi - transparent color and tall thin crystal structure it is most likely gypsum or quartzite.

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    $\begingroup$ Try to expand your answer to justify your response $\endgroup$ – arkaia Feb 27 '17 at 2:03
  • $\begingroup$ Definitely gypsum, the satin spar variety. Have a look at the pictures in this gallery. $\endgroup$ – Gimelist Jun 3 '17 at 7:36
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Looks like vein quartz (the white fibrous looking mineral) on a mass of iron stained granular quartz. Better focus would be useful.

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  • $\begingroup$ Quartz veins are very strong. The OP described that they are fragile in the comments. I think that the other answer, mentioning gypsum, is correct. $\endgroup$ – Gimelist Jun 3 '17 at 7:34

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