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Density fluid of 3 gm/cm^3

  1. Jul 11, 2010 #1

    I have a bunch of Quartz & Topaz crystals from an alluvial deposit in a mixed parcel, & I would like to separate them in a quick & easy way... I thought of using a fluid with a density of 3gm/cm^3 so that the quartz float & the topaz sink...

    Which liquid is applicable for this purpose?

    It is preferred if the fluid could be made out of common material available at home! :smile:

    I high appreciate your contributions & thanks in advance.
  2. jcsd
  3. Jul 12, 2010 #2
    If memory serves me correctly, they separate diamonds (relative density 3,5) from less dense minerals by heavy medium separation where the medium is a slurry of ferrosilicon and water.
  4. Jul 12, 2010 #3
    Thanks a lot Matcon!

    This is a truly nice information...
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