Luck-Bearing Precious Stones
The middle spread of the booklet contains a chart of birthstones and what they symbolize, and helpfully points out that such stones can be mounted on rings, barrettes, pendants in platinum, gold, silver.
The back page lists which stones must be worn each month to preserve one’s health. That Cleper is a clever fellow. His first name is Pierre; clearly, he was born to work with stones, was he not?