Can you identify these minerals?

What is your favourite kind of mineral?

  1. Metals

    33.3%
  2. Sulphides

    0 vote(s)
    0.0%
  3. Tellurides

    0 vote(s)
    0.0%
  4. Arsenides

    0 vote(s)
    0.0%
  5. Oxides

    33.3%
  6. Hydroxides

    0 vote(s)
    0.0%
  7. Fluorides

    16.7%
  8. Carbonates

    16.7%
  9. Nitrates

    0 vote(s)
    0.0%
  10. Borates

    8.3%
  11. Sulfates

    0 vote(s)
    0.0%
  12. Chromates

    8.3%
  13. Molybdates

    0 vote(s)
    0.0%
  14. Phosphates

    0 vote(s)
    0.0%
  15. Arsenates

    0 vote(s)
    0.0%
  16. Vanadates

    8.3%
  17. Silicates (a wide range)

    25.0%
  18. Metal Ores

    25.0%
Multiple votes are allowed.
  1. Can you help me identify this mineral and rock? I can't.
    I think the mineral is quartz.
    I tried the UV light, but it didn't work.
    (Mebbe it's something precious!) :eek:
     

    Attached Files:

  2. jcsd
  3. Simon Bridge

    Simon Bridge 15,261
    Science Advisor
    Homework Helper
    Gold Member

    I doubt we can tell exactly from the picture.
    What do you mean by "UV light ... didn't work"?
    How did you employ the UV light?
    What were you expecting?
    What happened?

    It looks like quartz or agate embedded in something igneous... but really just some white stuff in some grey stuff.

    Have you shown it to a geologist? A local rockhound?
     
  4. I need more information.

    At first glance, this slightly blurry photo suggests your rock is a piece of tar filled with fine gravel.

    How hard is this sample? (Can you scratch it with a knife?, with your finger nail?, etc.)
    How dense is it? Does it feel like it might be metal?
    Does it respond to a magnet?
     
  5. black rock

    Hi, I think at first sight the black rock can to be magmatic rock, very hard (isn't?). Quartz, right! And perahps a metal meet. At see later and good chance!
     
  6. Evo

    Staff: Mentor

    It looks like tar and gravel to me.
     
  7. I expect the OP was checking for fluorescence and phosphorescence of certain minerals.
    http://www.galleries.com/Fluorescent_Minerals

    The picture looks like some nest cleaning aggomeration from some burrowing animal of years gone past. Difficult to tell from the fuzzy picture.
     
  8. Simon Bridge

    Simon Bridge 15,261
    Science Advisor
    Homework Helper
    Gold Member

    Probably - still, nice not to have to guess and I like to encourage more scientific reporting in scientific sites ;)

    That hadn't occurred to me...

    I think the bottom line is that there is not enough data.
    Short answer: "no".
     
  9. PhysicoRaj

    PhysicoRaj 433
    Gold Member

    I have a lot of information about rocks :approve:(whether they're minerals or not) because I have played with them :biggrin: and even swallowed a lot of them:yuck: when I was small.
    At what place did you find it? A hillock? Roadside? Riverside?
     
    1 person likes this.
  10. It was found at a rocky beach which was also a fossil site. (Flat Rocks, Inverloch, Australia)
     
  11. PhysicoRaj

    PhysicoRaj 433
    Gold Member

    Did you check for the three things prescribed by daqddyo1?
     
  12. PhysicoRaj

    PhysicoRaj 433
    Gold Member

    After that heat a 'piece' of the 'bottom' part of the stone (bottom in the picture, a thick black layer) on your stove without allowing the flames to lick it. Does it melt?
     
  13. The black stuff at the bottom scratched metal. It has a density of about 2.8 g/cm3, and it is not attracted by a magnet. I will see if it melts when I heat it. How hot is a normal alcohol burner?
     
  14. PhysicoRaj

    PhysicoRaj 433
    Gold Member

    Hot enough to know if it makes a good rock or not!:biggrin: Anyway let's see if it melts.
     
  15. There are many metals - lead, tin, copper, iron, steel.
    You need the hardness of the rock based on a scale to properly identify.

    http://en.wikipedia.org/wiki/Mohs_scale_of_mineral_hardness
     
  16. please make a sharper shot? It can also be some other sedimentary matirx than tar and gravel
     
  17. The black stuff scratched a steel knife.
     
  18. PhysicoRaj

    PhysicoRaj 433
    Gold Member

    Then don't go to heat it.
     
  19. I did...:biggrin: The black stuff that the mineral was stuck in seems to be tar. The black rock at the bottom didn't.
     
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