Saxon, a retiree, was walking on his undeveloped land when he found an unusual looking rock. He took the rock to a store that sold jewelry and asked for an assessment.Jackson, a clerk and an aspiring jeweler, examined the rock and honestly indicated that he did not know what the rock was.He speculated that it could be a rough sapphire, and offered to pay $200 for it.Saxon agreed, completed the deal, and was paid.