Quartz Geode
Silicon Dioxide (SiO2)
mineral
Category
Mineral Like Byproduct (Often Mistaken For Igneous Rock Or Meteorite)
Browse mineral like byproduct (often mistaken for igneous rock or meteorite) specimens identified by the Rock Identifier community.
Learn about Mineral Like Byproduct (Often Mistaken For Igneous Rock Or Meteorite) in the encyclopedia
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Smoky Quartz
Smoky Quartz (Silicon Dioxide - SiO2)
mineral
Diorite
Diorite (Intermediate Plutonic Rock)
igneous
Rose Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Float/Abraded)
Quartz (SiO₂)
Mineral
Sandstone
Arenite (primarily composed of SiO2)
sedimentary
Note: Item is not a geological specimen
Guitar Components (Steel, Nickel, Plastic, Wood)
Synthetic/Consumer Product
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Basalt with Quartz/Calcite Veins
Amygdaloidal Basalt (SiO2 or CaCO3 inclusions)
igneous
Feldspar
Aluminosilicate (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8)
mineral
Diorite (Dalmatian Stone variant)
Phaneritic Plutonic Igneous Rock (Medium to Fine-grained Diorite)
igneous
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Smoky Quartz)
Silicon Dioxide (SiO2)
mineral
Amazonite
Potassium Feldspar (KAlSi3O8)
mineral
Garnet (likely Almandine or Pyrope)
Garnet Group (Fe3Al2Si3O12 or Mg3Al2Si3O12)
mineral
Milky Quartz with Chlorite/Amphibite Inclusions
Silicon Dioxide (SiO2) with various mineral inclusions
mineral
Porphyritic Basalt (Chinese Writing Stone)
Porphyritic Basalt or Andesite containing plagioclase feldspar phenocrysts
igneous
![Turquoise (Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]) — mineral](https://media.rockidentification.com/054f3fa7-f73a-456a-b566-38d3b6295e69-thumbnail.jpg)
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
gemstone
Coarse Sand Grain / Lithic Fragment
Clastic Sediment (Lithic fragment or Quartz/Feldspar grain)
sedimentary
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
mineral
Quartz Vein in Gneiss/Granite
Silicon Dioxide (SiO2) in Feldspar-Quartz Gneiss host rock
metamorphic
Ruby in Zoisite (Anyolite)
Corundum var. Ruby in Zoisite (Al2O3 + (Ca2Al3(SiO4)3(OH)))
metamorphic
Shale or Slaty Mudstone
Argillaceous sedimentary rock
sedimentary
Milky Quartz with Talc / Serpentine
Silicon Dioxide (SiO2) with Mg3Si4O10(OH)2
metamorphic
Obsidian
Obsidian (Volcanic Glass, complex silicate)
igneous
Yellow Quartz / Chalcedony Pebble
Silicon Dioxide (SiO2)
mineral
Porphyritic Basalt
Porphyritic Aphanitic Basalt with Plagioclase Phenocrysts
igneous
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Gneiss
High-grade metamorphic rock (Gneiss)
metamorphic
Black Onyx
Silicon Dioxide (SiO2) with parallel banding
mineral
Sandstone (Ferruginous)
Sandstone (Clastic sedimentary rock, predominantly SiO2 with Fe2O3 cement)
sedimentary
Basalt
Basalt (Mafic volcanic rock)
igneous
Sandstone (likely Conglomerate or Gritstone)
Arenite (SiO2 based)
sedimentary
Pumice (Basaltic/Scoria)
Vesicular Basalt / Scoria
igneous
Orthoclase Feldspar (or K-Feldspar)
Orthoclase (KAlSi3O8)
Mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral with metamorphic or sedimentary host
Banded Gneiss / Metamorphic River Pebble
Gneiss (Foliated Metamorphic Rock)
metamorphic
Geode
Quartz / Chalcedony nodule
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Amethyst
Quartz variety; chemical formula: SiO₂ (silicon dioxide) with Fe³⁺ impurities
Mineral
Granite
Granite (Felsic Plutonic Rock)
igneous