The gemstones are garnet and amethyst cabochons: two stones that featured prominently in medieval jewelry. The reddish-purple color of the garnet made it much sought after by Byzantine royalty and Germanic tribes in the early Middle Ages, for whom the hue signified power and prestige. Amethysts were thought to prevent drunkenness and protect warriors going into battle. Very useful indeed!
I love the idea of marking important life milestones with pieces of jewelry, in addition to the customary engagement/wedding rings. Wearable objects are such potent reminders- to be proud of our own individual life journeys and of our professional and personal accomplishments that don't always get much societal validation.
