What household liquid has a density of 3gm/cm^3 to separate minerals?

[Panthera Leo]

Hello,

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!

I high appreciate your contributions & thanks in advance.

 

[Matcon]

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.

 

[Panthera Leo]

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.

Thanks a lot Matcon!

This is a truly nice information...