White Sapphire is colorless variety of mineral Corundum.
White Sapphire has better Luster than that of White Topaz & White Rock Crystal due to higher Refractive Index.
White Sapphire is also more durable than White Topaz & White Rock Crystal due to more Hardness.
White sapphire or Colorless Sapphire is a variety of Mineral Corundum. White Sapphire ( called White Pukhraj in Hindi ) is a very good astrological substitute for Diamond worn for Venus planet as per Indian astrology.