Natural Raw Large Hematite And Goethite Specimen, Collectors SpecimenNatural Raw Large Hematite And Goethite Specimen, Collectors Specimen Weight 860g Size 13cm by 9. 5cm Thickness 2. 5cm Hematite is solid material with no internal structure visible and Goethite has the inner needle like structure. So if you look at broken surfaces and can see the inner close packed striated structure Goethite is the mineral. Goethite can also be tiny yellow to brown needles, standing on their own. Goethite is an iron hydroxide mineral