Sandstone (possible ferruginous or calcite-cemented variant) — sedimentary Identification & Properties | Geo-Gem
Sandstone (possible ferruginous or calcite-cemented variant) is a sedimentary. 1. Scratch test: Use a knife or steel nail to scratch the surface; if it scratches with difficulty and feels gritty, it is likely quartz-rich sandstone. 2. Streak test: Rub on unglazed porcelain to see a white (quartz) or yellow/brown stre…