Cursed Silver by Holly Horror and A. Anderson

Mary makes a long journey from sunny Florida back to where she grew up in cloudy, cornfield-covered Indiana following the sudden passing of her grandmother. Her mother, Nancy, has been abandoned by the rest of the family and left to put her grandmother's affairs into order. Not wanting to let her mother undertake this emotionally charged task alone, Mary joins her. Her mother even says that whatever she finds is hers to keep. But, the innocent task of cleaning out her grandmother's basement and what she finds to keep. . . turns Mary's life upside down forever.