Ruby is the gem of passion, of smoldering desire ... Rubies have been treasured for thousands of years, and continue to be objects of desire. The ancients thought the ruby's glowing red color was due to an inextinguishable inner fire, forever associating ruby with courage and power. Ruby jewelry remains a powerful choice. Show your passion with rubies, on Valentine's Day, or any time of the year for that matter. With their brilliant red color, rubies are naturally romantic. Dainty ruby charms and elegant ruby earrings are other fun ways to show you care. Ruby is the birthstone of July.