Shale with Coprolite influence
Argillaceous sedimentary rock (Shale/Mudstone)
Category
Browse mineral side rock specimens identified by the Rock Identifier community.
Shale with Coprolite influence
Argillaceous sedimentary rock (Shale/Mudstone)
Limestone (with Calcite Veining)
Calcium Carbonate (CaCO3)
Sandstone Pebble
Arenite (primarily SiO2)
Red Sandstone
Arenite (Ferruginous Sandstone)
Sandstone
Arenite (composed primarily of SiO2)
Sandstone
Arenite (primarily Quartz Sandstone)
Granite
Phaneritic plutonic igneous rock (SiO2 range 65-75%)
Sandstone (Iron-stained)
Clastic sedimentary rock (SiO2 with Fe2O3 staining)
Breccia
Breccia
Sandstone
Sandstone (clastic sedimentary rock), primarily SiO2
Dalmatian Stone (Dalmation Jasper)
Aplite with Arfvedsonite inclusions
Petrified Wood
Silicified wood (Quartz/Chalcedony - SiO2)
Sandstone (Ferruginous)
Ferruginous Sandstone (SiO2 with Fe2O3)
Banded Agate (with Quartz Geode Center)
Silicon Dioxide (SiO2)
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
Moss Agate
Silicon Dioxide (SiO2) with inclusions of Manganese or Iron oxides
Flower Agate
Chalcedony (SiO2) with Platy inclusions
Dendritic Agate
Dendritic Agate (Silicon Dioxide with Manganese or Iron Oxide inclusions, SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Black Onyx
Silicon Dioxide (SiO2) with parallel banding
Desert Rose
Gypsum (variety Selenite) or Barite, CaSO4·2H2O
Olivine/Peridot
Magnesium Iron Silicate (Mg,Fe)2SiO4
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Schist (Biotite Schist)
Biotite-bearing Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)
Quartz Vein with Iron Staining
Silicon Dioxide (SiO2) with limonite/hematite staining
Blue Quartz (Dumortierite Quartz)
SiO2 containing inclusions of Dumortierite [Al7(BO3)(SiO4)3O3]
Quartz (Milky/Crystal Variety)
Silicon Dioxide (SiO2)
Limonite (Iron Ore)
Limonite (an amorphous mixture of hydrated iron oxides, primarily FeO(OH)·nH2O)
Yellow Quartz Pebble
Silicon Dioxide (SiO2)
Sandstone (Greywacke/Lithic Sandstone)
Arenite / Lithic Sandstone
Epidote and Quartz in Basalt
Epidote [Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)] in Metabasalt
Ferruginous Sandstone
Sandstone with Iron Oxide (Limonite/Goethite)
Quartzite (with Quartz Veining)
Quartzite (SiO2)
River Quartzite Siltstone
Quartz-rich Meta-siltstone (SiO2 dominated)
Granite
Granite (Phaneritic Quartz-Feldspar rock)
Gneiss
Gneiss (High-grade metamorphic rock)
Porphyritic Andesite
Andesite (Intermediate Extrusive Volcanic Rock)
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)
Red Jasper (Brecciated Jasper)
SiO2 (Silicon Dioxide) with Ferric Iron inclusions
Rose Quartz (or Quartzite)
Silicon Dioxide (SiO2)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese