Results 1 to 2 of 2

Thread: Extracting topaz pebble from quartz gravel and pebble

  1. #1 Extracting topaz pebble from quartz gravel and pebble 
    Forum Sophomore
    Join Date
    Oct 2010
    I have been proposed a bucket of sand pretty rich in topaz (alluvions from northern Nigeria) for a ridiculous price (less than 40 $). I randomly sampled the sand, even deep inside and found 4 topazes bluish, good clarity, around 1-1.7 cm diam, about 5-8 grams each.

    So they are there.

    The problem is that there are not enough to make a significant difference of density in this sand (knowing I don't have the humidity % nor the other heavy components, there are quite a large amount of darkish things).

    Knowing the bucket is a big paint bucket of 50 cm height by 30 cm diam, what volume should I sample to get a good idea ?
    Or any other easy to assess the probable volume of topaze ?

    Reply With Quote  


  3. #2  
    WYSIWYG Moderator marnixR's Avatar
    Join Date
    Apr 2007
    Cardiff, Wales
    this piece of advice goes beyond the boundaries of earth sciences : "if something seems too good to be true, it usually is"

    "Reality is that which, when you stop believing in it, doesn't go away." (Philip K. Dick)
    Reply With Quote  

Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts