 Come to Juniker Jewelry Company. After all, we're practically family. Juniker Jewelry Company, Mississippi's direct diamond importer. 1485 Highland Colony Parkway, just south of 463 in Madison, and junikerjewelry.com. Rare coin prices have exploded in the last three years. Hard Asset Management, one of the world's largest precious metals and rare coin dealer firms, makes recommendations on what to buy for collectors who know what they're looking for.