Decorative stones and minerals, such as quartz, are the latest go-to design detail because of their natural appeal, bright colors and, yes, their perfect amount of sparkle. “Agate slices come in so many colors,” notes Jill Velez of Los Angeles-based Copper Willow Paper Studios. “They truly suit any event that is rooted in a natural aesthetic and needs a little glam.” Velez created these party favors by penning the last name of each guest on the quartz pieces. She says, “Their shine, finite sparkles and individual characteristics make each slice a true keepsake.”