Shaligram, which is a form of Himalayan Ammonite is considered very sacred in Hindu mythology. Shaligram is highly sought after by people who worship Vishnu (In any of its avatar). This formation is found only at Kali Gandak river in Nepal and nowhere else in the world.
Shaligram which has spiral formation just like ammonite, is considered an depiction of Sudarshan Chakra and has immense energy to transform your life.
 
Some of the metaphysical attributes of Shaligram :
> It helps to balance and address issues about six aspects of life - Wealth, Protection, Living, Health, Materialistic growth & Spiritual enhancement
> Worshiping Shaligram helps in creating harmony and love in relationships
> It is highly effective for protecting for self and family members
> It enhances your ability to evolve and follow your true path in life
> As a formation it is effective for cleansing karmic blockages including curses, oaths, etc
> It is helpful for the detoxification of physical as well as energy body
> It creates a natural balance in the elemental configuration of your energy system
> Shaligram enhances focus and creative thinking
> Helps in attaining a balance between spiritual and materialistic aspects of life
> It is also effective as a medium to channel healing energies for self or others.