Yellow Sapphire (Pukhraj) Yellow Sapphire is a highly precious, yellow colored gemstone of the Corundum mineral family. A yellow sapphire weighing 5-7 ratti will be effective. The yellow sapphire should be studded with a gold ring and worn on the index finger, on a Thursday, which falls in the shukal paksh. The time of wearing it should be between 6 am-8 am. Yellow sapphire is one of the most widely used gems to help achieve better financial status.