Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Category
Mineral, Specifically A Rock Fragment
Browse mineral, specifically a rock fragment specimens identified by the Rock Identifier community.
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Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Pink Granite
Granite (Felsic intrusive igneous rock)
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Chalcedony (Agate/Carnelian)
Cryptocrystalline Silicon Dioxide (SiO2)
mineral
Likely quartz fragment
Quartz (silicon dioxide, SiO₂), possibly milky quartz or quartz-rich rock
mineral
Quartz Chip
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily Quartz, SiO2)
sedimentary
Basalt Breccia
Volcanic Breccia (composed of basaltic clasts in a fine-grained matrix)
igneous
River Rock / Stream Pebble
Fluvial Clast / Rounded Sedimentary Particle
Sedimentary Rock (possibly composed of various minerals)
Fossiliferous Limestone with Crinoid Stem
Sedimentary Rock with Echinodermata fossil fragment
fossil
Milky quartz with iron-oxide staining
Quartz (silicon dioxide, SiO₂)
mineral
River Stone (Sedimentary Sandstone/Quartzite)
Arenite/Quartzite transition specimen
sedimentary
Banded Sandstone Peabble
Arenite with iron oxide banding
sedimentary
Sandstone with Quarzite clasts
Arenite (SiO2 based)
sedimentary
Sandstone (Weathered Cobble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (Lithic Wacke)
Clastic sedimentary rock (primarily SiO2 with rock fragments)
sedimentary
Chert (White-Tan variety)
Silicon dioxide (SiO2) / Microcrystalline Quartz
sedimentary
Sandstone
Sedimentary Rock (Quartz arenite / Lithic sandstone)
sedimentary
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Black Obsidian
Volcanic Glass (SiO2 with impurities)
igneous
Brecciated Jasper
Silicon Dioxide (SiO2) with iron impurities
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Red jasper (likely polished/chipped fragment)
Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides
mineral
Pink Granite
Phaneritic intrusive igneous rock (Felsic)
igneous
Sandstone
Quartzose Sandstone (Sedimentary Rock)
sedimentary
Granitic Pegmatite
Granite Pegmatite (coarse-grained intrusive igneous rock)
igneous
Green Moss Agate
Silicon Dioxide (SiO2) with Mineral Inclusions
sedimentary
Granitoid (with Epidote and Orthoclase)
Crystalline Felsic Intrusive Rock (containing SiO2, KAlSi3O8, and Ca2(Al2,Fe)(Si2O7)(SiO4)O(OH))
igneous
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Sedimentary Clastic Rock (Quartz Arenite)
sedimentary
Sandstone with Dendritic Inclusions
Quartzose Sandstone
sedimentary
Limestone Fragment
Sedimentary rock (primarily Calcium Carbonate, CaCO3)
sedimentary
Quartz (specifically Milky or Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz vein fragments on Sandstone cobble
SiO2 (Silicon Dioxide)
mineral
Quartz (Milky/Crystalline fragment)
Silicon Dioxide (SiO2)
mineral
Concrete fragment with Aggregate
Anthropogenic Concrete with Calcarious and Siliceous Aggregate
sedimentary (anthropogenic/man-made)
Diorite with Xenolith
Phaneritic Intermediate Plutonic Rock
igneous
Marble
Recrystallized Carbonate Rock (CaCO3)
metamorphic