Jasper (Iron-stained Quartzite/Chert)
Silicon Dioxide (SiO2) with iron oxide inclusions
Sedimentary
Category
Mineral
Browse mineral specimens identified by the Rock Identifier community.
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Obsidian
Obsidian (Volcanic Glass, SiO2)
igneous
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Pearl (nacre)
Calcium Carbonate (mostly CaCO3 as Aragonite) and Conchiolin
Organic Mineraloid
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz pebble
Silicon dioxide (SiO2)
Mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Gneiss (pronounced "nice")
metamorphic
Granite
Phaneritic Plutonic Rock (Granite)
igneous
Gneiss
Gneiss
metamorphic
Quartz (Quartzite fragment)
Silicon Dioxide (SiO2)
mineral
Ferruginous Quartz (River Pebble)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Greenschist
Greenschist (Chlorite-actinolite schist)
metamorphic
Fuchsite Gneiss or Schist
Muscovite (variety Fuchsite) within Metamorphic Host Rock
metamorphic
Aggregate Concrete
Anthropogenic Conglomerate (Technosol)
sedimentary
Vesicular Basalt (or Scoria)
Vesicular Basalt (Aphanitic-vesicular volcanic rock)
igneous
Quartz (Water-worn pebble)
Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, SiO2)
mineral
Basalt
Mafic Igneous Rock
igneous
Pyrite in Quartzite/Graphite Matrix
Iron Sulfide (FeS2)
Mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Granite River Pebble
Granite
igneous
Quartz Druze (Crystalline Quartz)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
SiO2 (Silicon Dioxide)
mineral
Native Sulfur
Sulfur (S8)
mineral
Red Sandstone
Arenite (with Iron Oxide / Hematite cementation)
sedimentary
Greenstone / Diabase Porphyry
Porphyritic Diabase (Micro-gabbro)
Igneous
Botryoidal Hemimorphite
Hemimorphite (Zn4Si2O7(OH)2·H2O)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Greenstone
Greenschist-facies basaltic rock
metamorphic
Fossilized Shark Tooth (Sand Tiger)
Carcharias sp. (Fossilized Tooth)
fossil
Fossilized Horse Tooth
Equus ferus caballus (fossilized molar/premolar)
fossil
Granite
Granite
Igneous
Sedimentary rock with quartz veining
Laminated siltstone or mudstone with hydrothermal quartz veins
sedimentary
Tiger Shark Fossil Tooth
Galeocerdo cuvier (fossilized)
sedimentary
Megalodon Shark Tooth Fossil
Otodus megalodon
sedimentary
Granitic Pegmatite with Tourmaline/Chlorite
Pegmatite
Igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Rutilated Quartz
Silicon Dioxide with Titanium Dioxide (SiO2 with TiO2 inclusions)
mineral
Vuggy Quartz on Matrix
Crystalline Silicon Dioxide (SiO2)
mineral