Looking at your horoscope we see that your Lagan is Aquarius and Saturn is the lord of the first house. Therefore you should can wear Neelem or Blue Sapphire in Silver on your right hand middle finger on Saturday morning for benefits. The weight of the stone corresponds to your weight. On an average a person with 65 – 75 Kgs should wear 6 1/4 ratti.
It is important that you test Neelam before you wear it.