Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Category
Mineral, Possibly Rock Fragment Containing A Mineral
Browse mineral, possibly rock fragment containing a mineral specimens identified by the Rock Identifier community.
Amber
Succinite (organic hydrocarbon)
mineraloid
Sandstone
Arenite (SiO2 primarily)
sedimentary
Ferruginous Sandstone
Sandstone, Iron-rich
sedimentary
Mica Schist
Mica Schist (primarily Muscovite and Biotite composition)
metamorphic
Shale (with minor calcite veining)
Clastic sedimentary rock (primarily clay minerals and quartz)
sedimentary
Pyrite (on Shale/Matrix)
Iron Disulfide (FeS2)
mineral
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
igneous
Basalt
Mafic volcanic rock (primarily plagioclase feldspar and pyroxene)
igneous
Greenschist (Greenstone)
Greenschist
metamorphic
Bumblebee Jasper
Calcite-Auripigment-Pyrite-Realgar assemblage (Carbonate/Sulphide mixture)
mineral
Polygenetic Breccia
Clastic Breccia (containing lithic fragments in a fine-grained matrix)
sedimentary
Geode (unopened)
SiO2 - Chert-shelled concretion (mostly Quartz)
sedimentary
Quartz
Quartz (SiO₂ - Silicon Dioxide)
mineral
Sandstone (Ferruginous)
Arenite with Iron Oxides
sedimentary
Sandstone-based Concrete Fragment
Cementitious Composite with Sedimentary Aggregate
sedimentary (man-made/anthropogenic)
Drill Core Samples (Varied Lithology)
Multi-lithological core samples (containing potential granite, marble, and phyllite/schist sequence)
igneous, sedimentary, and metamorphic
Graywacke
Graywacke
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Geode (Cracked Open Fragment)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Terrazzo (with Marble and Granite fragments)
Cementitious or resinous composite containing Calcium Carbonate (CaCO3) and Silicates
sedimentary (man-made composite)
Chondrite Meteorite
Ordinary Chondrite (S-type Asteroid fragment)
mineral
Sandstone (Banded)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Quartz (with inclusions / Sandstone fragment)
Silicon Dioxide (SiO2)
mineral
Agate (Fortification Agate)
Banded Chalcedony (SiO2)
mineral
Banded Jasper (possibly "Picture Jasper")
Jasper (a microcrystalline variety of Quartz / Silicon Dioxide - SiO2)
Sedimentary rock (specifically a chemical sedimentary rock, or a chert if considered purely mineral aggregate)
Glauconitic Sandstone (Greensand)
Glauconitic Sandstone ((K, Na)(Fe3+, Al, Mg)2(Si, Al)4O10(OH)2)
sedimentary
Breccia
Clastic Breccia (General mineral composition depends on fragments, often SiO2 or CaCO3)
sedimentary
River Rock (Greywacke/Sandstone)
Lithic Wacke
sedimentary
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily Quartz, SiO2)
sedimentary
Dendritic Agate (Tree Agate)
Chalcedony (Silicon Dioxide, SiO2) with Manganese or Iron Oxide inclusions
mineral
Sandstone
Arenite (SiO2 predominantly)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone
Arenite (Siliclastic Sedimentary Rock)
sedimentary
Milky Quartz with Matrix
Quartz (Silicon Dioxide, SiO2)
mineral