IRAC Method

Jim buys a pair of diamond earrings for $4000 for Andrea for her birthday from Goldstone Jewellery. Andrea insists upon only wearing 'ethical' jewellery and Goldstone Jewellery insists that all of the diamonds sold in their store are ethical and not conflict diamonds mined in war zones or using slave labour. When Andrea later has the earrings valued for insurance purposes she learns that Goldstone Jewellery were mistaken and that the diamonds in the earrings are in fact conflict diamonds. What rights does Jim have against Goldstone Jewellery? Focus on the law of mistake.