Dear Mr. Banerjee,

I suspect of dealing with a Zr concentration hosted by alkaline magmatic rocks. Any separation of a target mineral is first and foremost a question of the minerals which it is associated with. In pyroclastic rocks are certainly not only zircon and Zr silicates like vlasovite present. A more detailed information on the entire mineral assemblage is desireable. Otherwise chemical or mineralogical approaches taken are more or less a trial-and-error attempt the recovery grade of which cannot be determined.

Best regards

H.G.Dill

Thanks Sir for your reply..