Granite
Phaneritic intrusive igneous rock (approx. 70 percent SiO2)
igneous
Category
Minerals
Browse minerals specimens identified by the Rock Identifier community.
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Chert Conglomerate (or Breccia)
Sedimentary Clastic Rock (variety: Ferruginous Chert Breccia)
sedimentary
Sandstone (Quartz-rich)
Arenite (SiO2 based clastic rock)
sedimentary
Vesicular Basalt with Mineral Inclusions
Vesicular Basalt
igneous
Amazonite
Potassium aluminum silicate (KAlSi3O8)
mineral
Schist
Mica Schist
metamorphic
Turquoise
Hydrated phosphate of copper and aluminum (CuAl6(PO4)4(OH)8·4H2O)
mineral
Septarian (Dragon Stone)
Septarian concretion (Calcite, Aragonite, and Limestone)
sedimentary
Pink Granite
Granite (Phaneritic igneous rock rich in Alkali Feldspar)
igneous
Peach Moonstone Sphere
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Earth
Terra / Earth
igneous, sedimentary, and metamorphic
Gneiss Pebble
Gneiss
metamorphic
Schist (Biotite/Mica Schist)
Medium-grade regional metamorphic rock (rich in Phyllosilicates)
metamorphic
Granitoid (with Epidote and Orthoclase)
Crystalline Felsic Intrusive Rock (containing SiO2, KAlSi3O8, and Ca2(Al2,Fe)(Si2O7)(SiO4)O(OH))
igneous
Hematite
Iron(III) oxide (Fe2O3)
mineral
Turquoise
Turquoise (CuAl6(PO4)4(OH)8·4H2O)
mineral
Sandstone (Tumbled/River Pebble)
Arenite (composed primarily of SiO2)
sedimentary
Rose Quartz
Silicon Dioxide (SiO2) with Trace Inclusions
mineral
Fossil Shark Tooth
Carcharhiniformes fossil (likely Carcharhinidae family)
fossil
Conglomerate
Conglomerate (Sedimentary Rock)
sedimentary
Greenstone / Epidosite
Metamorphosed Mafic Igneous Rock (Epidote-Chlorite group)
metamorphic
Petrified Wood
Silicified Wood (SiO2)
fossil
Blue Quartz (Blue Aventurine)
Silicon Dioxide (SiO2) with inclusions of Dumortierite or Crocidolite
metamorphic
Hematite (Ironstone) Nodule
Hematite (Fe2O3)
mineral
Petrified Wood
Silicified Wood (SiO2)
mineral
Tufa (Calcareous Tufa)
Calcareous Tufa (Precipitated CaCO3)
sedimentary
Pearl and Garnet Glass
Calcium Carbonate (CaCO3) for pearl; Silicon Dioxide (SiO2) for glass
mineral and glass
Turquoise (likely Sleeping Beauty variety or treated Howlite imitation)
Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O
mineral
Chert (White Chert / Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Calligraphy Stone
Fossiliferous Limestone (containing Hematite and Shells)
sedimentary
Quartz (Milky or Cloudy Quartz)
Silicon Dioxide (SiO2)
mineral
Dragon Blood Jasper (Lizard Stone/Septarian Chalcedony)
Epidote with Black Hornblende and White Quartz mixture
metamorphic
Rose Quartz
Silicon Dioxide (SiO2) with trace Titanium, Manganese, or Iron
mineral
Megalodon Shark Tooth Fossil
Otodus megalodon (fossilized in sedimentary matrix)
sedimentary
Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrated copper and aluminium phosphate)
mineral
Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Vuggy Quartz / Chert
Silicon Dioxide (SiO2)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Ironstone Concretion (Moqui Marble variety)
Ferruginous Sandstone Concretion
sedimentary