Chert (Yellow/Tan Variety)
Chert (SiO2)
sedimentary
Category
Mineral, Often Found As A Rock (Metamorphic)
Browse mineral, often found as a rock (metamorphic) specimens identified by the Rock Identifier community.
Milky Quartz
Quartz / Silicon Dioxide (SiO2)
mineral
Biotite Schist (likely)
Biotite Schist (rock), Biotite (mineral)
Metamorphic
Quartzite Cobble
Quartzite (primarily SiO2)
metamorphic
Blue Apatite
Apatite - Ca5(PO4)3(F,Cl,OH)
mineral
Quartz Vein in Host Rock (Gneiss/Schist)
Silicon Dioxide (SiO2) within a metamorphic matrix
metamorphic
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Gneiss
Gneiss
metamorphic
Quartz (Double-Terminated)
Silicon Dioxide (SiO2)
mineral
Tumbled Green Jasper
Silicon Dioxide (SiO2) with mineral inclusions
sedimentary
Unakite
Epidotized Granite (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH) and KAlSi3O8)
metamorphic
Gneiss
Gneiss
metamorphic
Quartz (Milky/Common Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Peridot
Olivine ((Mg,Fe)2SiO4)
mineral
Yellow Quartzite
Quartzite (SiO2 with iron oxide inclusions)
metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Black Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Gneiss
Gneiss
metamorphic
Tiger's Eye (with Blue Tiger's Eye / Hawk's Eye)
Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)
metamorphic
Yellow Agate
Silicon Dioxide (SiO2)
mineral
Green Quartzite
Quartzite (primarily SiO2 with chlorite inclusions)
metamorphic
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
mineral
Agate Geode
Chalcedony (cryptocrystalline SiO2)
mineral
Schist
Mica Schist
metamorphic
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral
Iolite-bearing Gneiss (Cordierite)
Cordierite (Mg2Al4Si5O18) in Gneiss matrix
metamorphic
Mica Schist
Mica Schist (primarily Muscovite and Quartz)
metamorphic
Quartz Vein in Sedimentary Matrix
Silicon Dioxide (SiO2) with host rock
mineral
Chert (specifically Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz / Quartzite
Silicon Dioxide (SiO2)
mineral / metamorphic
Yellow Chert (Gold-toned Jasper)
Silicon Dioxide (SiO2)
sedimentary
Rough Star Sapphire (Corundum)
Al2O3 (Aluminum Oxide)
mineral
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss (a metamorphic rock)
Metamorphic
Quartz with Chalcopyrite and Pyrite
Silicon Dioxide (SiO2) with Copper Iron Sulfide (CuFeS2)
mineral
Smoky Quartz (with possible Garnet inclusions)
Silicon Dioxide (SiO2)
mineral
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Biotite Mica
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Pyrite in Quartz
Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)
Mineral
Milky Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
Mineral