Mica Schist with Iron Staining
Muscovite/Biotite Schist
metamorphic
Category
Mineral Based Alloy (Anthropogenic)
Browse mineral based alloy (anthropogenic) specimens identified by the Rock Identifier community.
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Pink Granite
Phaneritic Plutonic Felsic Igneous Rock (Granite)
igneous
Granite (Weathered)
Granite (Felsic Plutonic Rock)
igneous
Dragon Vein Agate
Chalcedony (Quartz) - SiO2
mineral
Snowflake Obsidian (Tumbled)
Obsidian with Cristobalite inclusions
igneous
Schist with Quartz/Mica
Mica Schist (primarily Muscovite and Quartz)
Metamorphic
Graywacke
Lithic Sandstone (Graywacke)
sedimentary
Schist (Micaceous Schist)
Micaceous schist (Mainly Muscovite/Biotite mixed with Quartz)
metamorphic
Mica Schist with Iron Staining
Mica Schist
metamorphic
Schist
Mica Schist
metamorphic
Granite
Phaneritic plutonic rock (SiO2 rich)
igneous
Schist
Mica Schist (Group of medium-grade metamorphic rocks)
metamorphic
Stichtite in Serpentine (Atlantisite)
Mg6Cr2CO3(OH)16·4H2O (Stichtite) / Mg3Si2O5(OH)4 (Serpentine)
metamorphic
Basalt with Weathering Rind
Basalt (Mafic volcanic rock)
igneous
Mica Schist
Mica Schist
metamorphic
Mica Schist
Mica Schist (primarily Muscovite and Quartz)
metamorphic
Sandstone (Glacial Cobble)
Arenite / Sedimentary Rock (primarily SiO2)
sedimentary
Granite
Phaneritic Igneous Rock (Granite)
igneous
Granodiorite
Granodiorite (containing quartz, plagioclase, and biotite/hornblende)
igneous
Vesicular Basalt (Scoria)
Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
igneous
Quartz (specifically Milky Quartz or Quartzite)
Silicon Dioxide (SiO2)
mineral
Porphyritic Basalt
Amygdaloidal Porphyritic Basalt
igneous
Aquamarine on Feldspar Matrix
Beryl (Be3Al2Si6O18) with Potassium Feldspar (KAlSi3O8)
mineral
Mica Schist (with Muscovite mica)
Mica Schist (KAl2(AlSi3O10)(OH)2)
metamorphic
Hematite
Hematite (Fe2O3)
mineral
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
Porphyritic Basalt or Andesite
Porphyritic Basalt/Andesite
Igneous
Granodiorite Pebble
Granodiorite
igneous
Granite
Granite (Felsic Intrusive Igneous Rock)
igneous
Granite
Granite (Phaneritic Quartz-Feldspar Rock)
igneous
Vesicular Basalt with Oxidation
Scoriaceous Olivine Basalt (Mafic volcanic rock)
igneous
Granite
Granite (a plutonic igneous rock composed primarily of quartz, feldspar, and mica)
igneous
Porphyritic Basalt (Amygdaloidal)
Porphyritic Mafic Volcanic Rock (Amygdaloidal Basalt)
igneous
Graywacke Pebble with Quartz Vein
Argillaceous Sandstone (Graywacke)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Black Veined Jasper (Spiderweb Jasper)
Silicon Dioxide (SiO2)
sedimentary
Granite with Mafic Inclusions
Granite (Phaneritic igneous rock composed of Quartz, Feldspar, and Mica)
igneous
Quartz with Mica inclusions (Gold-colored Mica)
Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (Phlogopite/Muscovite) inclusions
Mineral
Banded Agate (specifically Moss Agate or Plume Agate variety)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Jade
There are two distinct minerals commonly known as Jade: Jadeite (NaAlSi2O6) and Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2). Based on the appearance, these spheres are likely Nephrite.
Mineral
Vesicular Basalt
Aphanitic Mafic Igneous Rock (with vesicles)
igneous