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Posts posted by d_day

  1. 10 hours ago, Sketch said:

    Yes it really needs because I don't think any experts are there on this sites. Just wants to jump at conclusions without seeing its other other sides.:idunno:

    There are plenty. They’re just tired. They get real tired of answering questions for people that refuse to listen.

     There seems to be two types of people that ask for a stone to be identified. There are those that are genuinely looking for help, and those that are looking for confirmation—those that have already decided what it is but want someone to confirm. That second type, they won’t listen to anyone that says their stone is something other than what they want it to be, no matter what credentials the person trying to help them has.

     Imagine if I posted a picture of a baseball, and asked if it was a billiard ball. Obviously it’s not. Now imagine you answered that person and told them it was actually a baseball. Imagine 10 or 15 other people also said it was a baseball. What if those 10 or 15 people played baseball in college? That would give them enough experience to know what a baseball is despite baseball not being their career.

    Now imagine that I say everyone is wrong, it MUST be a billiard ball because it’s round like a billiard ball. I’d look pretty silly to everyone, and everyone would probably just stop answering my questions, right?

    • Like 4
  2. If you have access to a short wave UV light you can test for tungsten. Scheelite (tungsten ore) will fluoresce white or bright blue. If it fluoresces any other color or no color at all then you don’t have tungsten.

    i think Bob is probably correct saying you’ve got iron stained quartz and a mix of limonite and magnetite.

  3. To start with, every app I’ve tried for identifying rocks has been terrible. I’ve tested them with at least 10 known specimens and they all got every one of them wrong.

     Next, the first pic your app shows up there isn’t even a natural stone. It has very obviously been carved. You can still see the marks left by the burr they used. That tells me the app you’re using is completely worthless. 

    There is nothing to indicate your piece did not originate on earth. I’m not sure what you’ve got but I’m pretty sure it didn’t come from space.

    • Like 1
  4. 12 hours ago, DarkSilicate said:

    I'm no expert but to my eye they all look like microcrystalline varieties of quartz.  Fairly common in some locals.

    Edit: it seems I’ve quoted the wrong person. I meant to quote pondmn who stated that you might look into a local rock club.

    This is probably the best advice you’ll get. Here’s a list of clubs that are members of the California Federation of Mineralogical Societies. They’re sorted by name so you might haves to look through the whole thing to find one near you.


    • Thanks 1
  5. 3 hours ago, Quigi said:

    Just did a scrape test (on the back of a brown ceramic kitchen tile so I don't know if that counts) and it was white (colourless?) and it didn't really seem to scuff the mineral at all.


    Between that and your test with the knife we can rule out serpentine. Glaucophane is still a possibility, though I think jadeite is more likely. There are probably a few other possibilities. 

    Keep in mind though that making a proper ID from photos is difficult under the best circumstances.

  6. My first thought on that piece was carborundum, but I rules that out as soon as I saw the big crystals. There’s a few things that could be going on there. Those could be crystals of the actual mineral, those could be crystals of one mineral with a coating of another mineral, or it could be a pseudomorph, where one mineral grows and is then replaced by another mineral. 
    What is it though? I have no idea. It almost looks like vanadanite coated in manganese (hollandite or romanechite), but I’m pretty sure that’s not it.

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