Quartz and Mixed Sedimentary Rocks
Silicon Dioxide (SiO2) mixed with various clastic sedimentary lithologies
sedimentary
Category
Igneous, Metamorphic, And Sedimentary (Mixed Assemblage)
Browse igneous, metamorphic, and sedimentary (mixed assemblage) specimens identified by the Rock Identifier community.
Learn about Igneous, Metamorphic, And Sedimentary (Mixed Assemblage) in the encyclopedia
View all →
Metamorphic rock outcrop, likely schist or gneiss
Foliated metamorphic rock; exact mineral assemblage cannot be determined from the image
metamorphic
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Dearest Ring (Gemstones)
Mixed Gemstones: Diamond (C), Emerald (Be3Al2Si6O18), Amethyst (SiO2), Ruby (Al2O3), Sapphire (Al2O3), Topaz (Al2SiO4(F,OH)2)
mineral
Green Aventurine
SiO2
mineral
Likely marble or crystalline limestone
Calcite-rich marble (CaCO₃); image-based identification is uncertain
metamorphic
Small quartz-rich mineral fragment
Quartz (SiO₂), possibly milky or chalcedonic quartz
mineral
River Pebble
Quartzite or mixed lithology rock
sedimentary
Landscape Pebbles
Mixed Quartz and Limestone Gravel
sedimentary
River Pebble
Polished Quartzite or Mixed Lithology
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Tumbled feldspar-rich granite
Granite, composed mainly of quartz and feldspar with dark biotite or amphibole
igneous
Feldspar-Quartz Rock (likely Pegmatite or Granite)
Feldspar-Quartz composite rock (KAlSi3O8 - SiO2)
igneous
Granite Pebble
Granite (composed of Quartz, Feldspar, and Mica)
igneous
Weathered, veined rock fragment (likely granite or gneiss)
Probable granitic gneiss; quartz–feldspar–mica assemblage
igneous
Pink granite
Granite; quartz–alkali feldspar–plagioclase–biotite assemblage
igneous
Clear quartz (rock crystal)
Quartz, crystalline silicon dioxide (SiO₂)
mineral
Red coral (coral beads)
Precious coral, usually Corallium spp.; composed primarily of calcium carbonate (calcite)
gemstone
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Concrete Fragment
Artificial Conglomerate (Cement and Aggregate)
sedimentary
Unakite
Epidotized Granite
metamorphic
Unakite
Epidotized Granite
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Tiger Iron
Mixed Quartz, Hematite, and Tiger's Eye
metamorphic
Lapis Lazuli
Lapis Lazuli (a rock composed primarily of Lazurite)
Metamorphic rock
Asphalt (Bituminous Rock)
Natural bitumen or Bituminous limestone/sandstone
sedimentary