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The miners always educate to treat effluent water from the gravel washing machine and re-use after treat them to remove silt and mud by using number of sedimentation tanks and silt traps. The technique of circulation of effluent water through series of sedimentation ponds also minimizes water pollution by silt and mud was introduced. Existing pits after extract the gem gravel can be used easily as sedimentation ponds which will refill the pits automatically.





About NGJA

Srilanka the Gorgeous Pearl of The Indian Ocean is not only a beautiful Island nation veiled by the “Endless Sheets of Heaven” , The Magnificently Picturesque Nation is a “Treasure Island”, enriched with the astonishing splendor of vividly coloured bewitching gem stones that glitter to outshine the twinkling stars of a cloudless night.

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