Richard Turley et al. wrote about how Joseph used a seer stone.

“Seeing” and “seers” were part of the American and family culture in which Joseph Smith grew up. Steeped in the language of the Bible and a mixture of Anglo-European cultures brought over by immigrants to North America, some people in the early 19th century believed it was possible for gifted individuals to “see,” or receive spiritual manifestations, through material objects such as seer stones.The young Joseph Smith accepted such familiar folk ways of his day, including the idea of using seer stones to view lost or hidden objects. Since the biblical narrative showed God using physical objects to focus people’s faith or communicate spiritually in ancient times, Joseph and others assumed the same for their day. Joseph’s parents, Joseph Smith Sr. and Lucy Mack Smith, affirmed the family’s immersion in this culture and their use of physical objects in this way, and the villagers of Palmyra and Manchester, New York, where the Smiths lived, sought out Joseph to find lost objects before he moved to Pennsylvania in late 1827.See Full