• Slate
• Phyllite
• Schist
• Gneiss
• Marble
Slate is a fine-grained, low-grade metamorphic rock. It forms from the metamorphism of the sedimentary rock shale.
Slate (Photograph by Parvinder Sethi)
Phyllite is a fine-grained, low-grade metamorphic rock. It is slightly more metamorphosed than slate, and tends to have a crenulated or crinkled surface.
Phyllite (Photograph by Parvinder Sethi)
1.2 Mineral Identification
1.3 Major Mineral Groups
1.4 Selected Virginia Minerals
1.5 Tips for Mineral Collecting