River Sandstone (Lithic Arenite)
Lithic Sandstone (SiO2 dominated with lithic fragments)
sedimentary
Category
Mineraloid (Man Made Origin)
Browse mineraloid (man made origin) specimens identified by the Rock Identifier community.
Learn about Mineraloid (Man Made Origin) in the encyclopedia
View all →
Rose Quartz
Quartz (SiO₂), specifically a variety of Quartz
Mineral
Larimar
Pectolite (Blue variety), NaCa2Si3O10(OH)
mineral
Brown Jasper
Silicon Dioxide (SiO2)
sedimentary
Greenstone or Epidote-rich Metamorphic Rock
Chlorite/Epidote Schist or Greenstone
metamorphic
Obsidian
Volcanic Glass (predominantly SiO2)
igneous
Sandstone
Arenite (composed primarily of Quartz, SiO2)
sedimentary
Olivine (Peridot)
Olivine (Magnesium Iron Silicate, (Mg,Fe)2SiO4)
mineral
Granite Pebble
Granite (Phaneritic intrusive igneous rock comprising Quartz, Feldspar, and Mica)
igneous
River Pebble (Basalt or fine-grained Quartzite)
Fine-grained Mafic Rock (Volcanic Basalt)
igneous
Hag Stone
Perforated Flint or Chert (SiO2)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Limonite (Iron Ore)
Hydrated ferric oxide mixture (FeO(OH)·nH2O)
sedimentary
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Serpentinite
Serpentinite
metamorphic
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Lepidolite
K(Li,Al)3(Al,Si)4O10(F,OH)2 (Lithium-bearing phyllosilicate)
mineral
Granite
Granite (Felsic Plutonic Rock)
igneous
Quartzite
Quartzite (Primary mineral: Quartz, SiO2)
metamorphic
Iron Ore (Magnetite-Hematite)
Magnetite (Fe3O4) and Hematite (Fe2O3)
mineral
Moss Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxide
mineral
Aquamarine with Quartz
Beryl (Be3Al2Si6O18) with Quartz (SiO2)
mineral
Jasper
Jasper (Cryptocrystalline variety of Quartz, SiO2)
sedimentary
Quartz Vein in Host Rock (Gabbro or Basalt)
Silicon Dioxide (SiO2) with Mafic Silicates
metamorphic/igneous
Quartzite River Rock
Quartzite (SiO2)
metamorphic
Sandstone (likely Quartzose Sandstone with mineral staining)
Arenite (composed mainly of SiO2)
sedimentary
Quartz
Quartz (Silicon Dioxide - SiO2)
Mineral
Tiger's Eye
Tiger's Eye (a variety of Quartz, SiO₂)
Mineral (specifically a gemstone variety)
Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral
Quartz (Variety: Citrine or Tumbled Chalcedony)
Silicon Dioxide (SiO2)
mineral
Greenstone (Epidote/Chlorite-rich Metabasalt)
Greenschist / Epidosite (Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Banded Agate (specifically Gobi Eyes or Eye Agate)
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Chert (often called Flint)
Chert (Microcrystalline Silicon Dioxide, SiO2)
sedimentary
Gold Ore (in Quartz/Gossan matrix)
Native Gold (Au) in Limonite/Quartz matrix
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Diabase (also known as Dolerite)
Diabase / Microgabbro
igneous
Hematite (Iron Ore)
Iron(III) oxide (Fe2O3)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Slate
Slate
metamorphic
Fossilized Gastropod (Snail)
Class Gastropoda (internal mold or 'steinkern')
sedimentary
Shale
Fissile mudrock (composed of clay-sized particles and detrital grains)
sedimentary