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Thread: Please Identify

  1. #1 Please Identify 
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    I need to know what type of rock this is: It is smooth, black, melts above a candle, and easily washes off. I really want to see it under a microscope, but I'm afraid it may be toxic. So, please help. I hope to upload pictures soon


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  3. #2  
    Forum Professor jrmonroe's Avatar
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    If you have concerns that it's toxic, don't handle it or melt it above a candle (which would produce fumes). Can you give us a picture and/or more info?


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  4. #3  
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    Calculate its density. Measure its weight, then dip it in a graduated beaker to get its volume, and then perform the division. This will narrow down things a little bit, at least.
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  5. #4  
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    How did you aquire it? Where it came from could provide a clue.
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  6. #5  
    Forum Sophomore ReMakeIt's Avatar
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    This could be anything from dark chocolate to old tire rubber, more info is definitely needed.
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  7. #6  
    Forum Ph.D.
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    from your great quantity of data----- a tar ball
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