Milky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Mineral Side Rock
Browse mineral side rock specimens identified by the Rock Identifier community.
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Carnelian (Red Agate)
Silicon dioxide (SiO2) with iron oxide impurities
mineral
Ocean Jasper
SiO2 (Silicon Dioxide) - Chalcedony variety
mineral
Amethyst
SiO2 (Silicon Dioxide with iron impurities)
mineral
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Carnelian Agate Nodule
Silicon Dioxide (SiO2) - Carnelian Chalcedony
mineral
Blue Dyed Agate
Silicon Dioxide (SiO2) with artificial pigment
mineral
Blue Chalcedony
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Banded Agate
Agate (Cryptocrystalline Quartz, SiO2)
mineral
Dyed Agate
Silicon Dioxide (SiO2) - variety Chalcedony
mineral
Aragonite / Calcite Geode
Calcium Carbonate (CaCO3)
mineral
Quartz Pebble (Grit)
Silicon Dioxide (SiO2)
mineral
Pyrite in Shale
Iron Sulfide (FeS2)
mineral
Ironstone Concretion (Boji Stone/Moqui Marble type)
Goethite/Hematite-encrusted Sandstone Concretion
sedimentary
Granite Thin Section
Granitic rock (Phaneritic texture)
igneous
Blue Apatite
Apatite group (Ca5(PO4)3(F,Cl,OH))
mineral
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Marble
Recrystallized Carbonate Rock (CaCO3)
metamorphic
Marble
Recrystallized Calcite Rock (CaCO3)
metamorphic
Quartz Druzy Geode Fragment
Silicon Dioxide (SiO2)
mineral
Yellow Ochre / Limonite
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
metamorphic
Dendritic Agate (Tree Agate)
Chalcedony (Silicon Dioxide, SiO2) with Manganese or Iron Oxide inclusions
mineral
Sandstone (Ferruginous)
Arenite with Iron Oxide cement (SiO2 + Fe2O3)
sedimentary
Granodiorite
Granodiorite
igneous
Felsic Tuff
Pyroclastic volcanic rock (Tuff)
igneous
Granite
Granite
igneous
Quartz (likely Rose Quartz or Milky Quartz based on color)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Basalt
Mafic Igneous Rock (composed primarily of plagioclase feldspar and pyroxene)
igneous
Zinc Ore (Sphalerite in Matrix)
Sphalerite (Zn,Fe)S within a carbonate or silicate host rock
mineral
Basalt
Basalt (composition of plagioclase feldspar and pyroxene)
igneous
Gneiss
Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Mica/Amphibole)
metamorphic
Porphyritic Basalt (Leopard Palm Stone)
Porphyritic Mafic Volcanic Rock
igneous
Granitoid (Granite/Gneiss mix)
Granite or Granitic Gneiss (Silicon dioxide SiO2 with Al, K, Na silicates)
igneous/metamorphic
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
metamorphic
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Limonite Concretion
Goethite-Limonite (FeO(OH)·nH2O)
sedimentary
Sandstone
Arenite
sedimentary
Rough Ruby
Corundum (Al2O3 with Chromium impurities)
mineral
Granite
Granite (Phaneritic Igneous Rock)
igneous
Quartz Vein in Host Rock (Breccia/Rhyolite)
Silicon Dioxide (SiO2) with matrix
Mineral in Igneous/Sedimentary host