Rhodonite
Rhodonite (Manganese Iron Magnesium Calcium Silicate) - (Mn,Fe,Mg,Ca)SiO3
mineral
Category
Mineral, Often Found As A Rock (Metamorphic)
Browse mineral, often found as a rock (metamorphic) specimens identified by the Rock Identifier community.
Quartz Vein with Host Rock (Greywacke/Siltstone)
Silicon Dioxide (SiO2) within Clastic Sedimentary/Metamorphic Matrix
metamorphic
Orthoclase Feldspar
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Amazonite
KAlSi3O8 (Potassium Feldspar, variety of Microcline)
Mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Yellow Quartzite (River Pebble)
Metamorphic Quartzite (SiO2)
metamorphic
Schist
Mica Schist (primarily composed of quartz, feldspar, and mica)
metamorphic
Beryl (likely Emerald or Aquamarine in matrix)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Quartzite (tumbled or water-worn)
Quartzite (composition: SiO2)
metamorphic
Garnet (Red Garnet)
Garnet Group. The red varieties seen in jewelry are typically Almandine (Fe3Al2(SiO4)3), Pyrope (Mg3Al2(SiO4)3), or a mix of the two (pyrope-almandine series).
Mineral (specifically, a variety of the mineral species Pyrope-Almandine Garnet)
Serpentine
Antigorite/Lizardite (Mg, Fe)3Si2O5(OH)4
metamorphic
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
River Pebble (Likely Chert or Fine-Grained Sandstone/Quartzite)
Siliciclastic clast (likely Chert or Quartzarenite/Quartzite pebble)
Sedimentary
Shale
Argillaceous Rock
sedimentary
Lapis Lazuli
Lapis Lazuli (Mineral composition: Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2, Calcite, and Pyrite)
metamorphic
Marble
Recrystallized Calcite Rock (CaCO3)
metamorphic
Limonite (Iron Ore)
Hydrous Iron Oxide (goethite, lepidocrocite)
Mineral
Quartz (Common Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Black Marble
Recrystallized Limestone (CaCO3)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Hypersthene
Hypersthene (Enstatite variety), (Mg,Fe)SiO3
Mineral
Sandstone (lithic wacke)
Arenite / Lithic Wacke (mostly SiO2 with rock fragments)
sedimentary
Slate
Foliated Metamorphic Rock
metamorphic
Lapis Lazuli
Lapis Lazuli (A complex rock primarily composed of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Epidote
Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Rhodonite
Rhodonite (MnSiO3)
Mineral
Quartzite with Iron Staining
Silicon Dioxide (SiO2) with Fe2O3 impurities
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Metamorphic Rock (variety of Quartz)
Hypersthene
Enstatite (Hypersthene variety), (Mg,Fe)SiO3
mineral
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Specular Hematite (Specularite)
Iron(III) oxide (Fe2O3)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite (River Cobble)
Quartzite (SiO2)
metamorphic
Serpentinite
Serpentinite (group of hydrous magnesium iron phyllosilicates)
metamorphic