Hematite
Hematite (Fe2O3)
mineral
Category
Mineral Based Composite
Browse mineral based composite specimens identified by the Rock Identifier community.
Learn about Mineral Based Composite in the encyclopedia
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Agate with Quartz Druzy
Silicon Dioxide (SiO2) - Microcrystalline and Macrocrystalline varieties
mineral
Biotite or Phlogopite Mica
K(Mg,Fe)3(AlSi3O10)(F,OH)2
mineral
Granite
Phaneritic plutonic rock (SiO2 rich)
igneous
Dalmatian Jasper (Dalmatian Stone)
Dalmatian Stone (primarily Feldspar, Quartz, and Arfvedsonite/Tourmaline)
igneous
Porphyritic Basalt (with Olivine or Quartz phenocryst)
Porphyritic Basalt (Mafic Extrusive)
igneous
Basalt
Mafic extrusive igneous rock
igneous
Graywacke
Lithic Sandstone (Graywacke)
sedimentary
Mica Schist with Iron Staining
Muscovite/Biotite Schist
metamorphic
Mica Schist
Mica Schist (predominantly Muscovite/Biotite)
metamorphic
Diorite
Intermediate Phaneritic Igneous Rock
igneous
Mica Schist
Mica Schist
metamorphic
Vesicular Basalt River Rock
Vesicular Basalt
igneous
Mica (Biotite or Phlogopite Buchsam)
Silicate Mineral (Phyllosilicate family)
mineral
Conglomerate
Conglomerate (Clastic Sedimentary Rock)
Sedimentary
Schist
Mica Schist (contains muscovite/biotite and quartz)
metamorphic
Granite
Granite (composed primarily of Quartz SiO2, Alkali Feldspar KAlSi3O8, and Plagioclase)
igneous
Granite
Granite
igneous
Chert (Field Stone/Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Snowflake Obsidian
Vitreous volcanic silicate (SiO2 with Cristobalite inclusions)
Igneous
Kyanite (within Quartz)
Kyanite (Al2SiO5) in crystalline Quartz base (SiO2)
metamorphic
Sandstone (Iron-stained)
Clastic sedimentary rock (SiO2 with Fe2O3 staining)
sedimentary
Vesicular Basalt
Extrusive mafic igneous rock
igneous
Lepidolite
K(Li,Al)3(Si,Al)4O10(F,OH)2
mineral
Mixed Tumbled Rocks and Minerals Collection
Mixed Minerals and Rocks (Quartz, Feldspar, Jasper, Agate, Lapis Lazuli, Sodalite, Rose Quartz, Fluorite, etc.)
mineral
Fuchsite
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Aquamarine on Feldspar Matrix
Beryl (Be3Al2Si6O18) with Potassium Feldspar (KAlSi3O8)
mineral
Goldstone (Synthetic Aventurescence Glass)
Cuprous Aventurescent Glass (Silicon Dioxide with Copper inclusions)
mineraloid / man-made material
Raw Citrine
Citrine (Silicon Dioxide, SiO2)
mineral
Tree Agate
Chalcedony with Dendritic Chlorite (SiO2 with impurities)
sedimentary/mineral
Milky Quartz with Mica
Silicon Dioxide (SiO2) with Muscovite or Biotite inclusions
mineral
Granodiorite (Gravel Pebble)
Granodiorite
igneous
Diorite
Phaneritic Intermediate Igneous Rock
igneous
Granite (Alkali-feldspar rich)
Phaneritic Felsic Igneous Rock (Major components: KAlSi3O8, SiO2)
igneous
Sandstone (Quartzose Pebble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Dalmatian Stone
Dalmatian Jasper (Aplitic Rock)
igneous
Rounded basalt pebble
Basalt, aphanitic mafic volcanic rock; primarily plagioclase and pyroxene with possible olivine
igneous
Black basalt
Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase, pyroxene, and commonly olivine
igneous
Mica Schist
Schist (primarily muscovite and quartz)
metamorphic
Pink Granite
Felsic Plutonic Rock (Granite)
igneous
Vesicular Basalt with Oxidation
Scoriaceous Olivine Basalt (Mafic volcanic rock)
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous