Two naturally joined Rudraksha called Gauri Shankar is regarded as the form of Shiva & Parvati. It is so much full of influence that it causes the development and expansion of universe due to its being the unified and identified form of the Lord Shiva and the Goddess Uma. This form becomes the cause of expansion of the universe providing fertility. It makes the husband and wife identify each other. Therefore it is regarded the best thing for peace and comfort in the family.