Blue Sapphire (Raw)
Corundum (Al2O3)
mineral
Category
Metamorphic Rock (Primarily Composed Of Minerals)
Browse metamorphic rock (primarily composed of minerals) specimens identified by the Rock Identifier community.
Learn about Metamorphic Rock (Primarily Composed Of Minerals) in the encyclopedia
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Quartz with Hematite Staining
Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3) inclusions
mineral
Sandstone (River Cobble)
Clastic sedimentary rock (primarily SiO2 with various lithic fragments)
sedimentary
Green Aventurine
Silicon Dioxide (Quartz) with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Magnetite-rich Iron Ore
Magnetite (Fe3O4)
mineral
Ferruginous Quartzite (Iron-stained Quartz)
Quartzite (SiO2 with Fe-oxide staining)
metamorphic
Unakite
Unakite (Epidotized Granite)
metamorphic
Jadeite (Jade Ring)
NaAlSi2O6 (Sodium Aluminum Silicate)
metamorphic
Granite Cobble
Granite
igneous
Fuchsite-bearing Quartzite (Green Quartzite)
Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2) in Quartzite
metamorphic
Blue Calcite
Calcite (CaCO3)
mineral
Sodalite
Sodalite (Na4Al3Si3O12Cl)
Mineral
Tree Agate
Dendritic Chalcedony (SiO2)
sedimentary
Gneiss
Gneiss
metamorphic
Granite river rock
Granite (composed of Quartz, Feldspar, and Mica)
igneous
Yellow Chalcedony (common opal or chert variant)
Silicon Dioxide (SiO2)
sedimentary (mineraloid/microcrystalline quartz)
Sandstone (Banded)
Clastic Sedimentary Rock (composed of SiO2, CaCO3, or Fe2O3 cement)
sedimentary
Amethyst Quartz
Silicon Dioxide (SiO2)
mineral
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Amygdaloidal Basalt
Amygdaloidal Basalt with Secondary Infilling (e.g., Agate, Quartz, or Zeolite)
igneous
Diorite (River Cobble)
Intermediate plutonic igneous rock
igneous
Coquina
Bioclastic Limestone
sedimentary
Petrified Wood
Silicified wood (primarily SiO2)
metamorphic
Basalt
Basalt (Mafic volcanic rock)
igneous
Mica Schist
Mica Schist (with Muscovite)
metamorphic
Quartz with Fuchsite (or Chlorite)
SiO2 (Silicon Dioxide) with K(Al,Cr)2(AlSi3O10)(OH)2 (Fuchsite)
mineral
Green Quartzite
Quartzite (primarily SiO2 with inclusions)
metamorphic
Amygdaloidal Basalt
Amygdaloidal Basalt
igneous
Iron-stained Quartz Vein
Silicon Dioxide (SiO2) with Limonite/Hematite inclusions
mineral
Fluorite and Rose Quartz
Fluorite (CaF2), Rose Quartz (SiO2)
Mineral
Nephrite Jade
Ca2(Mg,Fe)5Si8O22(OH)2 (Calcium magnesium iron silicate)
metamorphic
Cockle Shell (Fossil or Recent)
Class Bivalvia, Family Cardiidae (e.g., Cerastoderma edule for common cockle)
Sedimentary (Biogenic, a type of fossil)
Lapis Lazuli
Complex mixture of minerals, primarily Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2
metamorphic
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Smoky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)3Si3O10(OH)2)
metamorphic
Tree Agate
Dendritic Agate (Silicon Dioxide, SiO2 with chlorite inclusions)
mineral
![Garnet in Matrix (Eclogite) (Eclogite, featuring Almandine or Pyrope Garnet [X3Y2(SiO4)3]) — metamorphic](https://media.rockidentification.com/a7ec3f8a-b87b-486e-b45f-1dd4612a59cc-thumbnail.jpg)
Garnet in Matrix (Eclogite)
Eclogite, featuring Almandine or Pyrope Garnet [X3Y2(SiO4)3]
metamorphic
Conglomerate
Conglomerate rock
sedimentary
Anthracite Coal
Anthracite (Carbon C)
metamorphic
Educational Geologic Collection
Mixed Mineral and Rock Collection (Various compositions)
mineral
Quartz
Quartz (SiO₂)
Mineral