Mineral, Part Of A Rock

Sandstone Concretion

Ferruginous Sandstone Concretion (Primarily SiO2 with Iron Oxide cement)

Petrified Wood

Silicified Wood (primarily SiO2)

Greenstone

Metamorphosed Mafic Igneous Rock

Sandstone (likely Quartzose Sandstone)

Arenite (SiO2 predominantly)

Amphibolite with Hornblende

Amphibole-rich Metamorphic Rock (Ca2(Mg,Fe)5Si8O22(OH)2)

Schist with Quartz/Mica

Mica Schist (primarily Muscovite and Quartz)

Sandstone (specifically Lithic or Quartz Arenite)

Arenite (composed primarily of SiO2)

Goethite (Iron Ore)

Goethite (FeO(OH))

Red Sandstone Pebble

Arenite (primarily Quartz SiO2 with Hematite Fe2O3 staining)

Sandstone

Arenite (primarily SiO2)

Sandstone (likely Quartzose Sandstone)

Clastic Sedimentary Rock (primarily SiO2)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone

Arenite (primarily SiO2)

Sandstone (with Iron Staining)

Clastic sedimentary rock (SiO2 with Fe2O3 impurities)

Sandstone (Quartzose Sandstone)

Clastic Terrigenous Sedimentary Rock (primarily SiO2)

Orca Agate (Blue Chalcedony)

Silicon Dioxide (SiO2)

Jasper (Yellow Jasper)

Silicon Dioxide (SiO2) with iron inclusions

Sandstone

Clastic sedimentary rock (primarily SiO2)

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

Septarian Nodule (Dragon Stone)

Septarian concretion (composition: CaCO3 - Calcite, Aragonite, and Siderite/Limestone)

Conglomerate

Conglomerate rock

Dalmation Stone (frequently called Dalmatian Jasper)

Peralkaline Quartz-Feldspar Rock

Quartz Geode (River Cobble)

Silicon Dioxide (SiO2)

Granite Cobble

Granite (Phaneritic Quartz-Feldspar Felsic Rock)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Schist (Micaceous Schist)

Schist (comprising Muscovite/Biotite mica, Quartz, and Feldspar)

Dyed Purple Agate

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Breciated Chert

Brecciated Chert (Microcrystalline Quartz, SiO2)

Unakite

Epidotized Granite

Black Limestone with Calcite Veining

Bituminous Limestone (CaCO3 with Organic Carbon inclusions)

Quartz vein in Host Rock

Crystalline Silicon Dioxide (SiO2) in Lithic Matrix

Gneiss (Cobble)

Gneiss

Kimberlite

Kimberlite

Sandstone (Ferruginous)

Arenite with Iron-Oxide Cement (primarily SiO2 with Fe2O3/FeOOH)

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Diamond in Kimberlite

Kimberlite host rock with C (Carbon) inclusion

Milky Quartz

Silicon Dioxide (SiO2)

Granite

Granite (a plutonic igneous rock)

Sandstone

Sandstone (clastic sedimentary rock, composed predominantly of sand-sized minerals or rock fragments)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

Sandstone (likely Quartzose Sandstone)

Arenite (primarily SiO2)

Sandstone (Greywacke/Siltstone variant)

Clastic Sedimentary Rock (composed primarily of Quartz SiO2 and Feldspar)