Hi Sumit,
You can wear white zircon, however it should be of at least 6 carat of weight and it should be worn on right hand little finger set in Silver.
As once you have worn it already, I would suggest you to buy a new one else the same gemstone should have not been worn for at least 6 months. And it should be energized again based on the methods prescribed in the forum of other member’s thread and worn on particular auspicious muhurtham. You can come back to the forum to know the best muhurtham.
GOD BLESS!!!
Srinivasa Temkar