WHAT DEFINES JAR'S WORK IS HIS SUPERIOR CRAFTSMANSHIP, EVOCATIVE OF THE QUALITY OF ART IN THE 18TH AND 19TH CENTURIES, OFTEN RESULTING IN COMPARATIVELY SCULPTURAL OBJECTS AND HIS PROPENSITY FOR INCORPORATING UNUSUAL GEMSTONES INTO HIS CREATIONS RESULTING IN VIVID COLOR PALETTES. THE SUPERB PINK DIAMOND SET WITHIN A PALE BLUE SAPPHIRE SURROUND IS A SOFT AND SUBTLE JEWEL AND YET ONE THAT IS EVER SO STRIKING, A BALANCE THAT ONLY JOEL ROSENTHAL WOULD IMAGINE.