Grouping of Rocks and Minerals

Seven Rocks and Minderals: Petrified wood, probably from Wyoming, three-nodule concretion, probably from the Mojave Desert, double-terminated smoky quartz crystal, Chaffee County, Colorado, gypsum, probably from Morocco, desert rose, probably from Canada, azurite, probably from China, and galena, probably from Missouri; Smoky quartz crystal

2 × 12 1/2 × 2 1/2 in | 5.1 × 31.8 × 6.4 cm