Quartz (likely Jasper or Chert variety)
Quartz (SiO₂)
Mineral
Category
Metamorphic Rock (Specifically A Rock Composed Of Minerals)
Browse metamorphic rock (specifically a rock composed of minerals) specimens identified by the Rock Identifier community.
Basalt River Pebble
Extrusive mafic igneous rock; primarily composed of Plagioclase Feldspar and Pyroxene
Igneous
Sunstone
Plagioclase Feldspar (specifically Oligoclase variety containing hematite or goethite inclusions)", composition: (Ca,Na)(Al,Si)2Si2O8
Mineral
Granite
Granite (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Pink Granite
Granite (Phaneritic intrusive rock rich in K-feldspar)
igneous
Azurite and Malachite on Matrix
Azurite: Cu3(CO3)2(OH)2; Malachite: Cu2CO3(OH)2
mineral
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Chert (specifically Flint)
Microcrystalline quartz (SiO2)
sedimentary
Granite
Granite (Phaneritic intrusive igneous rock; primarily SiO2 and Al2O3)
igneous
Limonite Concretion
Goethite-rich Concretion (FeO(OH))
sedimentary
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Almandine Garnet
Almandine (Fe3Al2Si3O12)
mineral
Travertine
Travertine (CaCO3 - Calcium Carbonate)
sedimentary
Citrine
Silicon Dioxide (SiO2) with iron impurities
mineral
Citrine Quartz
Citrine (Silicon Dioxide, SiO2)
mineral
Rhodonite
Rhodonite (MnSiO3)
mineral
Granite Pebble
Granite (composed primarily of Quartz SiO2, Feldspar KAlSi3O8, and Mica)
igneous
Serpentine
Antigorite, Lizardite, or Chrysotile (Mg, Fe)3Si2O5(OH)4
metamorphic
Leopard Skin Jasper
Jasper (Silicon Dioxide with impurities), SiO2
sedimentary
Turquoise
Turquoise (CuAl6(PO4)4(OH)8·4H2O)
mineral
Quartz
Quartz (SiO₂)
Mineral
Clear Quartz (or Rock Crystal)
Quartz (SiO₂)
Mineral
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Eclogite
Eclogite (Pyrope garnet and Omphacite pyroxene)
metamorphic
Quartz (Milky/Common Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Basalt
Extrusive Mafic Igneous Rock (composed primarily of plagioclase feldspar and pyroxene)
igneous
Tektite (specifically Indochinite)
Tektite (Natural silica glass)
Mineraloid (Impact glass)
Serpentine
Serpentine Group Minerals (e.g., Antigorite, Chrysotile, Lizardite)
Mineral, often found as a rock
Chert
Silicon dioxide (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
metamorphic
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
mineral
Agate (specifically Carnelian or Honey Agate)
Silicon Dioxide (SiO2)
Mineral
Pebble (likely Quartz or Chert)
SiO₂ (Silicon Dioxide) - referring to the likely main mineral composition, Quartz. If it's chert, the scientific name remains SiO₂ with a microcrystalline structure.
Sedimentary Rock
Basalt
Mafic Igneous Rock (composed primarily of Plagioclase and Pyroxene)
igneous
Quartz
Quartz (SiO₂)
Mineral
Basalt with Epidote/Chlorite
Amygdaloidal Basalt (SiO2 with (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)))
igneous
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Garnet Schist
Almandine Garnet-Mica Schist (X₃Y₂(SiO₄)₃)
metamorphic
Grey Slate
Foliated Metamorphic Rock (formed by low-grade regional metamorphism of shale or mudstone)
metamorphic