Also see Electional and Mahurta Astrology
When a gemstone is purchased and also placed in its setting it is very important that it be done at an astrologically appropriate time (Election or Muhurta).
Also the gem and jewelry piece should be cleansed and charged with a mantra correspondent to the stone's planetary energy. The stone should be treated as sacred. We have noticed a significant increase in energy when these Tantric and Kabbalistic methods are adhered to. For more information please feel free to call on these matters.