Although these pieces were listed as earrings, we believe them to be nose rings.  Items of this nature were also used as currency.  Made of shell, the largest being 1 3.8 inches in diameter.  In a protective Richardson case.  Noted as having been found in Copper County, Mississippi.  The items come from the collection of Bernard and Bernadette Lueck, founders of the Heritage of Americas Museum in El Cajon, CA.   Inn very good condition.