A little less buoyant than Rinkoff's similar treatment of grasses (KR, 1972) and trees (KR, 1974), this lists different uses of rocks from the caves of early man, the weights mentioned in the Bible, and the Egyptian pyramids to the astronauts' collection of moon rocks for scientific study. In between Hopi women grind corn, colonial school children write on slates, various peoples from the Papua to the Irish attribute magical properties to certain rocks (the Blarney stone) or certain rituals performed with rocks, and even seagulls open clams by dropping them on rocks. A word on birthstones is followed by a passing mention of minerals that are mined from rocks and used for gas and oil and various metals. More a different way of approaching a subject than an investigation of any topic, this is probably best used to shake heads loose for informal group discussions. Morrill's smudgy clay colored prints remain in the background.