Pink Feldspar
Potassium Feldspar (Microcline or Orthoclase), KAlSi3O8
mineral
Category
Igneous, Sedimentary, Metamorphic
Browse igneous, sedimentary, metamorphic specimens identified by the Rock Identifier community.
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Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz Mineral
Silicon Dioxide (SiO2)
mineral
Hematite
Hematite (Α-Fe2O3)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Fragment
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon dioxide (SiO2)
Mineral
Educational Geologic Collection
Mixed Mineral and Rock Collection (Various compositions)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Gneiss (River Cobble)
Metamorphic Gneiss
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Magnetite / Hematite mix (Iron Ore)
Fe3O4 (Magnetite) / Fe2O3 (Hematite)
mineral
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Blue Apatite
Calcium phosphate mineral, Ca5(PO4)3(F,Cl,OH)
mineral
Possibly citrine (yellow quartz)
Quartz, SiO₂; variety uncertain from the image
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon dioxide (SiO2)
sedimentary
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Gneiss and Igneous Rock Collection
Foliated Metamorphic Rock (Gneiss) / Igneous Rocks
metamorphic
Pyrite
Iron Pyrite (FeS2)
Mineral
Quartz (likely a form of massive or vein quartz)
Quartz (SiO₂)
Mineral
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon dioxide (SiO2)
sedimentary
Banded gneiss pebble
Gneiss, likely quartz–feldspar–mica gneiss
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Schist
Metamorphic Rock (Schist)
metamorphic
Iron-stained quartz vein
Quartz (SiO₂) with iron-oxide/hydroxide staining, likely limonite/goethite
mineral
Small pale mineral/rock fragment
Indeterminate; possibly weathered quartz, calcite, or light-colored limestone
mineral
Quartz (Milky or Cloudy Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Stone Mosaic Mask
Composite silicate and carbonate minerals
mineral
Quartz
Silicon Dioxide (SiO2)
mineral