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.
So, it is the most preferred
gift as ancient texts mention that gifting rudraksha accrues punya.