PERSEVERANCE PAYS OFFPalm Beach is known for luxury and long languid days by the pool, and it's that kind of easy elegance that jewelry designer Jordann M. Weingartner tries to instill in her line. Jordann Jewelry offers monogrammed necklaces, bracelets, earrings and rings, $150 to $2,000. We like her signature Magnolia shape, which is eye-catching and symbolizes perseverance -- her dad's favorite word, she says. Wise man. Look for the line at Michaels Jewelry Design, Rockville Centre; and