Greywacke
Dec. 25, 2024
Greywacke (1kg) - Geology Superstore Raw Greywacke, Sedimentary Rock Specimen - Approx. 1" - Geologist Selected & Hand Processed - Great for Science Classrooms - Eisco Labs (1): Amazon.com: Industrial & Scientific Greywacke pebbles with quartz veins – Gemstones – Te Ara Encyclopedia of New Zealand Greywacke