cleaning rough diamonds
, 01:15 PM
use tooth brushto brush away dirt with water...then use a wire brush to brush off the loose scales, etc..
to identify rough as diamond...it will look dull when washed with water..quartz and other material will look brilliant in water...
try putting a small drop of water onto the rough stone..if is diamond the drop of water remain a an elliptical/semi circular shape and will not spread into the rough..diamond is hydrophobic.
next put a drop of oil on it...it will spread and be absorb into the rough...diamond is lipofilic..like oil but don't like water..
next scratch a quartz crystal if u have one...the quart crystal will give in..diamond is the hardest on the hardnest scale 10 whereas quartz 7
next test..measure the specific gravity...shld be 3.5.gm/cm3 .weight of stone/ volume of stone
next look at the rough under sunlight shld glitter shone like mirror ..luster brilliant diamantre..hope for the best if all passed....then u got a d stone
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