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Is this iron ore? I found it in the back yard in Western Australia few years back; it has a roughish surface. It was sticking out of my grass. It has sand grains stuck on it. It is reasonably hard, and a really shiny silver colour.

photo of sampleanother photo of sample

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  • $\begingroup$ Welcome to Earth Science Stack Exchange! These aren't bad photos, but it would help if you could provide a bit more information, as outlined in this guide. $\endgroup$ – kwinkunks Sep 8 '15 at 13:34
  • $\begingroup$ Is it magnetic? What happens when you hold a magnet near it? Try to find a reasonable magnet, not the ones you put on your fridge $\endgroup$ – Gimelist Sep 8 '15 at 22:11
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    $\begingroup$ You need to photograph these things in outside daylight as well (maybe in the shade if the sun is really bright) $\endgroup$ – Jan Doggen Sep 9 '15 at 9:20
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    $\begingroup$ Find a mug or a bowl or a ceramic tile with no glaze on the bottom. If you rub the rock on the unglazed clay, what colour is the streak left behind? $\endgroup$ – haresfur Sep 9 '15 at 23:05
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    $\begingroup$ And please edit all your comment answers (also that one under the first answer) into your question as well. Comments disappear, and a question should contain all relevant info. $\endgroup$ – Jan Doggen Sep 11 '15 at 12:07
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Given the photographs and the additional information you gave in the comments, I would say that this is specular hematite.

Hematite is iron ore - its chemical formula is $\ce{Fe2O3}$. It's a mineral that's usually red-brown, but in some cases it appears shiny with a somewhat metallic lustre - that's the "specular" bit in it. The streak of hematite is red-brown. I'm guessing that your specimen is not pure, so that's why you get a bit of grey colour in the streak.

That said, mineral identification over the internet is not usually a simple thing and I could be wrong. There are dozens of minerals out there that are consistent with your description, but hematite is pretty common and not unlikely to find in WA.

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  • $\begingroup$ Cheers thanks for that mate. One thing I didn't say is it has a small crystallisation on it $\endgroup$ – user16944 Sep 11 '15 at 2:57
  • $\begingroup$ Sure! Don't forget to accept the answer by clicking that "V" next to the upvote/downvote buttons $\endgroup$ – Gimelist Sep 11 '15 at 3:55

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