Red Jasper (possibly Agatized Jasper)
Jasper (Silicon Dioxide, SiO2 with Fe2O3 inclusions)
sedimentary
Category
Sedimentary Rock (Specifically A Concretion Or Possibly A Geode)
Browse sedimentary rock (specifically a concretion or possibly a geode) specimens identified by the Rock Identifier community.
Conglomerate
Conglomerate Rock (Paraconglomerate)
sedimentary
Emerald / Green Beryl
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Amethyst (Variety of Quartz)
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Pink Granite
Granite (Felsic Plutonic Rock)
igneous
Vesicular Basalt (River Rock)
Afanitic Vesicular Basalt
igneous
Chert Nodule (Fossiliferous Chert)
Microcrystalline Quartz (SiO2)
sedimentary
Clear Quartz (Druzy/Crystal Cluster)
Silicon Dioxide (SiO2)
mineral
Quartz with Chalcedony
Silicon dioxide (SiO2)
mineral
Moss Agate
Silicon Dioxide with inclusions (SiO2 + Fe/Mn/Mg)
mineral
Red Jasper
Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)
sedimentary
Chert / Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Coral Rock (Coquina)
Biogenic Limestone (Calcium Carbonate - CaCO3)
sedimentary
Amethyst Geode Cathedral
Amethyst (Silicon Dioxide - SiO2 with Iron impurities)
mineral
Pink Granite
Granite (Phaneritic intrusive igneous rock dominated by Quartz and K-Feldspar)
igneous
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Nuummite
Nuummite (ortho-amphibole rock)
metamorphic
Yellow Quartz (Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Aragonite Star Cluster
Aragonite (Calcium Carbonate, CaCO3)
mineral
Druzy Quartz on Host Rock
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
SiO2 (Silicon Dioxide)
Mineral
Septarian Nodule (Septaria)
Septarian Nodule (Calcium Carbonate/Aragonite/Calcite Concretion)
sedimentary
Septarian Nodule
Septarian Concretion (Composition: Calcite, Aragonite, and Limestone/Clay)
sedimentary
Moqui Marble (Shaman Stone)
Iron Oxide Concretion (Limonite/Hematite over Sandstone)
sedimentary
Septarian Nodule (Dragon Stone)
Septarian Nodule (Calcium Carbonate/Aragonite/Calcite Concretion)
sedimentary
Moqui Marble (Shaman Stone)
Iron Oxide Concretion (Hematite/Goethite-encased Sandstone)
sedimentary
Septarian Nodule
Septarian concretion (Complex mixture of Siderite, Calcite, and Aragonite)
sedimentary
Carnelian
Carnelian (a variety of Chalcedony, SiO₂)
Mineral
Greywacke with Quartz Vein
Matrix: Impure Sandstone (SiO2 + varied clasts), Veins: Quartz (SiO2)
sedimentary
Amethyst
Amethyst (Silicon Dioxide with iron impurities), SiO2
mineral
Blue Lace Agate
Silicon dioxide (SiO2) - Chalcedony variety
mineral
Gneiss (Banded Gneiss)
Gneiss
metamorphic
N/A - Image does not contain a rock or mineral
Anthropogenic textile material
Non-geological
River Pebble (Quartzite/Siltstone mixture)
Silicon Dioxide (SiO2) mixture with varied clastic minerals
sedimentary/metamorphic
Quartz (various varieties)
SiO₂ (Silicon Dioxide)
Mineral
Chert (Iron-stained)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with iron oxide Fe2O3 cement)
sedimentary
Botryoidal Chalcedony Geode
Silicon Dioxide (SiO2) - Chalcedony / Cryptocrystalline Quartz
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Banded Metamorphic Rock (likely Quartzite or Serpentinite/Soapstone)
Metamorphic Rock (possibly a banded Quartzite or a foliated Serpentinite/Talc Schist based on appearance, general term for such a rock is 'Banded Metamorphic Rock' or 'Gneiss' if pronounced banding of different minerals)
Metamorphic