Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Category
Metamorphic Or Sedimentary Depending On Local Grade
Browse metamorphic or sedimentary depending on local grade specimens identified by the Rock Identifier community.
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Garnet Schist
Almandine Garnet in Mica Schist
metamorphic
Quartz Geode (Cracked Open Fragment)
Silicon Dioxide (SiO2)
mineral
Tanzanite
Zoisite (Ca2Al3(SiO4)(Si2O7)O(OH))
gemstone
Granite / Gneiss Complex
Felsic Plutonic Rock (Granite) or High-grade Metamorphic Rock (Gneiss)
igneous/metamorphic
Banded Slate
Slate (Metamorphosed Siltstone/Mudstone)
metamorphic
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Quartz (specifically Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Quartzite
Metamorphic Quartz Sandstone
metamorphic
Jade (likely Nephrite Jade based on appearance)
Nephrite (a variety of actinolite, Ca2(Mg,Fe)5Si8O22(OH)2)
Mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Biotite Schist
Biotite Schist
Metamorphic
Jasper
Silicon dioxide (SiO2)
sedimentary
Gneiss with Quartz Vein
Metamorphic Gneiss with Quartz (SiO2) and Feldspar Injection
metamorphic
Ruby (Corundum)
Aluminum oxide (Al2O3) with Chromium traces
mineral
Biotite-bearing granite or granitic gneiss
Quartz–feldspar–biotite assemblage; possibly metamorphosed granite (gneiss)
igneous
Puddingstone (Conglomerate)
Conglomerate (clastic sedimentary rock)
sedimentary
Galena
Lead Sulfide (PbS)
mineral
Yellow Quartz (Citrine Quartz / Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Blue Sapphire
Corundum (Al2O3)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz-rich rock, likely milky quartz vein material
Quartz (SiO₂), possibly iron-stained massive quartz with minor feldspar or mica
mineral
Gneiss
Gneiss
metamorphic
Garnet Gneiss
Gneiss containing Almandine Garnet
metamorphic
Blue-gray quartz-rich rock, likely quartzite
Quartzite; predominantly microcrystalline quartz (SiO₂), possibly with mica or feldspar
metamorphic
Gneiss
Gneiss
metamorphic
Rough Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Garnet Schist
Mica Schist with Almandine (Fe3Al2(SiO4)3)
metamorphic
Gneiss
Metamorphic Gneiss (High-grade regional metamorphism)
metamorphic
Gneiss
Metamorphic Gneiss (High-grade regional metamorphism)
metamorphic
Blue Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss
High-grade regional metamorphic rock (Foliated)
metamorphic
Greenschist
Chlorite schist
metamorphic
Garnet Schist
Almandine-Mica Schist
metamorphic
Greenschist
Chlorite schist
metamorphic
Quartz Crystal Rock
Silicon Dioxide (SiO2)
mineral
Pebble (river rock/beach pebble)
Pebble (clast size class)
Sedimentary Rock