Sky blue topaz is a natural, light blue colored, semi-precious gemstone of the Topaz mineral family. ... Vedic astrology recommends Sky blue topaz as the astrological substitute of Blue Sapphire (Neelam stone).
Due to its high durability and vitreous shine, this gemstone is immensely popular for jewelry purposes.
Blue topaz promotes harmony and relaxation and can be especially helpful in healing hurt feelings and calming frayed nerves. In the past, topaz has been used to soothe fears and protect against nightmares to give a restful and serene night's sleep. Ancient civilizations believed the blue topaz to have cooling powers.