Two naturally joined rudrakshas are called Gaurishankar.
It is regarded as unified form of Shiva and Shakti.
Some people call this variety Ardhnareeshwar Rudraksha.
Gauri-Shankar can be worn in order to improve the relationships between husband and wife, father and son and between friends.
Those aspiring to get married or couple desirous of having children wear this Rudraksha.