Pavé-set ruby rose cufflinks in 14k black
gold; $3,200; Borgioni, New York City; 212-226-8878; borgionis.com

In ancient times, the ruby—worn by royalty as a talisman against evil—was thought to possess magical powers. Associated with the universal feelings of love, passion, and power, July’s birthstone is one of the hardest gems, after diamonds. It is traditionally given as the anniversary stone for 40 years of marriage.