The wheels continue spinning in Jay Klos’ energetic mind.The owner of Florence, Ala.–based Grogan Jewelers is looking forward to celebrating his store’s centennial anniversary this June with a spirited event spotlighting the business’s longevity and community ties. He’s considering raffling off a car or staging a giveaway of ten 1 ct. diamonds.“Whatever I do, I want to make a splash,” says Klos, who has owned Grogan Jewelers since 1985. “So few firms have been around 100 years. I want to grab people’s attention.”Every year, jewelers across the country hit noteworthy milestones, marking the occasions with celebrations aimed at gaining attention, engaging customers, boosting traffic, and corralling sales. We’ve rounded up a number of jewelers who celebrated big birthdays in 2014 to glean some tips on how to recognize the enduring role an established store plays in its