Gemorium India Pvt. Ltd supplies Octagonal Shaped Blue Topaz. Gemorium India Pvt. Ltd also offers various types of precious and semi-precious stones. The Octagonal Shaped Blue Topaz is used for designing jewellery. The Octagonal Shaped Blue Topaz is also believed to have astrological properties. The Octagonal Shaped Blue Topaz is a very hard gemstone but it can be split with a single blow. As a result it should be protected from hard knocks. This Stone is advised by astrologers to people born under signs of Libra and Sagittarius.