Chalcedony (Agate/Chert)
Silicon Dioxide (SiO₂)
mineral
Category
Mineral, Often Found As Detrital Grains In Sedimentary Rocks
Browse mineral, often found as detrital grains in sedimentary rocks specimens identified by the Rock Identifier community.
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Basalt with Quartz/Calcite matrix
Basalt (SiO2 with Ca/Mg/Fe silicates) on a Mineral Matrix
igneous
Milky Quartz (Water-worn Pebble)
Quartz (Silicon Dioxide, SiO2)
mineral
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Petrified Wood
Silicified Wood (SiO2)
mineral
Siltstone
Siltstone (primarily composed of SiO2 with various clay minerals)
sedimentary
Granite
Granite (a plutonic igneous rock composed primarily of quartz, feldspar, and mica)
igneous
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Sandstone-based Concrete Fragment
Cementitious Composite with Sedimentary Aggregate
sedimentary (man-made/anthropogenic)
Pyrite
Iron Disulfide (FeS2)
mineral
Yellow Quartzite (River Pebble)
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Pyrite
Pyrite (FeS₂)
Mineral
Moqui Marble
Iron Oxide Concretion (Hematite/Goethite-cemented Sandstone)
sedimentary
Quartzite
Quartzite (principally SiO2)
metamorphic
Pink Quartzite
Quartzite (SiO2)
metamorphic
Conglomerate
Clastic Sedimentary Conglomerate (SiO2, CaCO3, etc.)
sedimentary
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Schist
Mica Schist
metamorphic
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Pyrite (Iron Pyrite)
Iron Sulfide (FeS2)
mineral
Specular Hematite (Specularite)
Iron(III) oxide (Fe2O3)
mineral
Optical Calcite (Iceland Spar)
Calcite (Calcium Carbonate, CaCO3)
mineral
Red Mudstone (Siltstone)
Lutite (primarily Quartz and Clay minerals with Hematite)
sedimentary
Peridot
Olivine (Magnesium Iron Silicate), (Mg, Fe)2SiO4
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Orange Quartzite / Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions
metamorphic
Olivine (Peridotite)
Olivine Group; (Mg, Fe)2SiO4
igneous
Quartzite
Quartzite (primarily SiO₂)
metamorphic
Pyrite in Matrix (Quartz/Schist)
Iron Sulfide (FeS2)
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary