Yellow calcite is  a warm yellow stone associated  the solar plexus chakra, which is our emotional center for self confidence , motivation  and hope.  It assist us in clearing out old energy patterns and increasing motivation and personal drive.  Yellow calcite aids on transformation of one's own mentality and self image.   It helps reducing self doubt and procrastination.  Being a mental stone  it  works on mental discernment  aiding on memory and learning  abilities.