In America, where the grasp of Irish culture—even among those of Irish descent—ventures little past St. Patrick's Day and claddagh rings, the debut of Galantas jewelry is surprising even the most jaded of consumers and retailers. The Irish company boasts something better than folklore's pot of gold at rainbow's end: a gold mine in Ireland's County Tyrone. Though the mine was discovered about 14 years ago, Galantas—a full-scale jewelry company with its own mine and jewelry manufacturing facility—began operating only last fall. After debuting on a small scale and finding a receptive audience in Ireland, the company crossed the pond and set up an office in Boston. Though it's still researching the U.S. market and is not yet prepared for full-scale trade operations here, Galantas is finding itself the subject of inquiry and interest. To boost its American and international profile,