Pegmatite
Granitic Pegmatite
igneous
Category
Sedimentary Like (Industrial Composite)
Browse sedimentary like (industrial composite) specimens identified by the Rock Identifier community.
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Orthoclase Feldspar
Potassium aluminum silicate (KAlSi3O8)
mineral
Banded Agate
Chalcedony / Silicon Dioxide (SiO2)
mineral
Pegmatitic Granite
Granite with Orthoclase Feldspar and Quartz (SiO2, KAlSi3O8)
igneous
Desert Rose (Sand Barite/Gypsum Rose)
Barium Sulfate (BaSO4) or Hydrated Calcium Sulfate (CaSO4·2H2O)
mineral
Granite
Granite (Felsic Plutonic Rock)
igneous
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Almandine Garnet in Matrix
Almandine, Fe3Al2(SiO4)3
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Quartz Pebble (Milky and Gray)
Quartz (Silicon Dioxide, SiO2)
mineral
![Schist (Mica Schist (formula variable based on mineral content, typically containing [K,Al,Fe,Mg,Si,O,H])) — metamorphic](https://media.rockidentification.com/82921e91-3bee-4a52-8b94-97f62233f834-thumbnail.jpg)
Schist
Mica Schist (formula variable based on mineral content, typically containing [K,Al,Fe,Mg,Si,O,H])
metamorphic
Tumbled Stone Collection (featuring Tiger's Eye, Rose Quartz, and Moss Agate)
Mixed Silicates and Oxides (predominantly SiO2 group minerals)
mineral
Small rounded pebble
Indeterminate lithic grain; likely weathered sandstone, iron-stained quartz-rich rock, or a concretion
sedimentary
Clear Quartz (Carved Dragon)
Quartz (Silicon Dioxide, SiO2)
mineral
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Vesicular Basalt
Extrusive Mafic Igneous Rock (Vesicular Basalt)
igneous
Ferrous Slag
Iron/Steel Slag (Complex Calcium-Alumino-Silicates)
Anthropgenic (Industrial Byproduct)
Yellow Sapphire
Corundum (Al2O3)
gemstone
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Sandstone
Arenite (SiO2 based with quartz grains)
sedimentary
Tourmaline
Schorl (Complex boron silicate, NaFe3Al6(Si6O18)(BO3)3(OH)4)
mineral
Tiny amber-colored crystal fragment
Indeterminate; possibly quartz, feldspar, mica, or a sulfide mineral
mineral
Schist
Mica Schist
metamorphic
Polymer Clay (Mock Mineral)
Polyvinyl chloride (PVC) with plasticizers and pigment
Synthetic material (Not a natural rock/mineral)
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrated Iron Oxide)
mineral
Slag
Ferrous Slag (Amorphous calcium-magnesium-aluminum silicates)
igneous (artificial/anthropogenic)
Yellow Calcite
Calcite (CaCO3)
mineral
Chalcedony (Quartz)
Silicon Dioxide (SiO2)
mineral
Garnet
Garnet Group (Silicate Minerals), formula varies e.g., Almandine Fe3Al2(SiO4)3
mineral
Agate
Chalcedony (SiO2)
mineral
Beryl (Aquamarine variety)
Beryllium Aluminum Cyclosilicate (Be3Al2Si6O18)
mineral
Vesicular Basalt
Aphanitic Mafic Igneous Rock (with Vesicular Texture)
igneous
Titanium Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
mineral
Rough Garnet (Almandine)
Almandine Garnet (Fe3Al2(SiO4)3)
mineral
Limestone
Calcium Carbonate (CaCO3 - Calcite)
sedimentary
Yellow Sapphire
Corundum (Al2O3)
gemstone
Quartz Pebble (with Hematite Inclusions)
Silicon Dioxide (SiO2)
mineral
Olivine (Peridot)
Magnesium Iron Silicate ((Mg, Fe)2SiO4)
mineral
Silicon Carbide (Carborundum)
Silicon Carbide (SiC)
mineral