Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Category
Mineral, Often A Rock Given Its Aggregate Nature
Browse mineral, often a rock given its aggregate nature specimens identified by the Rock Identifier community.
Pebble (Likely Basalt or Siltstone)
Clastic sedimentary rock or mafic volcanic rock
Igneous or Sedimentary
Basalt
Basalt
igneous
Conglomerate
Conglomerate (SiO2 matrix with various silicate clasts)
sedimentary
Basalt
Basalt (Mafic igneous rock)
igneous
Basalt
Mafic Igneous Rock (composed primarily of plagioclase feldspar and pyroxene)
Igneous
Basalt with Quartz/Calcite Veins
Basalt (Aphanitic Mafic Volcanic Rock) with Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3) inclusions
igneous
Basalt
Mafic volcanic rock (various silicate minerals including Pyroxene and Plagioclase)
igneous
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Scoria (Lava Rock)
Mafic extrusive volcanic rock (Scientific formula varies based on mineral content: primarily SiO2, MgO, and FeO)
igneous
River Rock (Quartzite)
Quartzite (SiO2)
metamorphic
Shale (Beach-worn)
Laminated Pelite (primarily clay minerals and quartz)
sedimentary
Rough Quartz (with potential Host Rock)
Silicon Dioxide (SiO2)
mineral
Greenstone (Amygdaloidal Basalt)
Amygdaloidal Basalt (frequently composed of Plagioclase Feldspar, Pyroxene, and Olivine with Chlorite inclusions)
igneous
Granite
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Basalt
Basalt
igneous
Granite Gneiss
Gneiss (derived from granitic protolith)
metamorphic
Basalt with Quartz Veins
Basalt (composition: SiO2, MgO, FeO, Al2O3, CaO)
igneous
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Basalt
Basalt (Mafic volcanic rock)
Igneous
Basalt
Extrusive mafic igneous rock
igneous
Dalmatian Stone (often misnamed Dalmatian Jasper)
Aplite (with hornblende/arfvedsonite inclusions)
igneous
Serpentine
Antigorite, Lizardite, or Chrysotile (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Scoria (Basaltic Lava Rock)
Vesicular Basalt
igneous
Quartzite (River Stone)
Quartzite
metamorphic
Granite Cobble
Phaneritic Plutonic Felsic Rock
igneous
Fossiliferous Limestone
Fossiliferous Limestone
sedimentary
Chert / Flint
Chert (Silicon Dioxide, SiO2)
sedimentary
Riverstone Quartzite
Quartzite (primarily SiO2)
metamorphic
Basalt
Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
igneous
Granite Pebble
Granite (a plutonic igneous rock composed primarily of quartz, feldspar, and mica/amphibole)
igneous
Ferruginous Quartz
Silicon Dioxide (SiO2) with Hematite/Goethite inclusions
mineral
Quartzite (River Pebble)
Metamorphic Quartzite (SiO2)
metamorphic
Granite
Granite (Felsic Plutonic Rock)
igneous
Yellow Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Granite Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
River Pebble (Likely Chert or Fine-Grained Sandstone/Quartzite)
Siliciclastic clast (likely Chert or Quartzarenite/Quartzite pebble)
Sedimentary
Quartzite (River Pebble)
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Unakite
Epidotized Granite
metamorphic
Milky Quartz in Conglomerate Matrix
Silicon Dioxide (SiO2) within Clastic Sedimentary Rock
sedimentary
Quartzite River Rock
Quartzite (SiO2)
metamorphic