Milky Quartz with inclusions
Quartz (Silicon Dioxide, SiO2)
mineral
Category
Mineral, Possibly Rock Fragment Containing A Mineral
Browse mineral, possibly rock fragment containing a mineral specimens identified by the Rock Identifier community.
Granodiorite
Granodiorite (Intermediate to Felsic Intrusive Rock)
igneous
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Desert Rose
Gypsum (variety Selenite) - CaSO4·2H2O
mineral
Granite
Phaneritic Igneous Rock (Granite)
igneous
Basalt with Quartz/Calcite Inclusions
Mafic Volcanic Rock (Fe-Mg silicate rich)
igneous
Basalt with Epidote Veins
Mafic Igneous Rock (Basalt)
igneous
Goldstone (Red/Brown)
Aventurine Glass (SiO2 with Copper inclusions)
Mineral (Man-made glass)
Blue Chalcedony
Microcrystalline Quartz (SiO2)
mineral
Granite with Mafic Inclusions
Granite (Phaneritic igneous rock composed of Quartz, Feldspar, and Mica)
igneous
Serpentinite
Serpentinite (composed primarily of serpentine minerals like antigorite, chrysotile, and lizardite)
metamorphic
Schist
Crystalline Metamorphic Rock (Schistose)
metamorphic
Lapis Lazuli
Complex mixture containing Lazurite ((Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2), Calcite, and Pyrite
metamorphic
Dalmation Stone (Dalmation Jasper)
Peralkaline rock (primarily Feldspar and Quartz with Arfvedsonite spots)
igneous
Granite
Intrusive igneous rock (Acidic)
igneous
Granite / Gneiss Complex
Felsic Plutonic Rock (Granite) or High-grade Metamorphic Rock (Gneiss)
igneous/metamorphic
Graywacke (River Cobble)
Graywacke (Lithic Sandstone)
sedimentary
Iron-Stained Quartz (Riverside Cobble)
Silicon Dioxide (SiO2) with Limonite/Hematite inclusions
mineral
Lapis Lazuli
Complex mixture of minerals (lazurite, calcite, pyrite, and sodalite); (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2
metamorphic
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Basalt River Pebble
Basalt (Mafic Extrusive Volcanic Rock)
igneous
Vesicular Basalt
Extrusive Mafic Igneous Rock (composed of Plagioclase feldspar, Pyroxene, and Olivine)
igneous
Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Banded Agate (specifically Carnelian Agate)
Silicon dioxide (SiO2) - Chalcedony variety
mineral
Mexican Crazy Lace Agate
Silicon Dioxide (SiO2) with iron and aluminum inclusions
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Limestone with Quartz or Calcite Veining
Calcium Carbonate (CaCO3) matrix with SiO2 or CaCO3 inclusions
sedimentary
Slag
Ferrous slag (by-product of iron smelting)
Mineraloid / Anthropogenic
Quartz Geode (partially formed)
Silicon Dioxide (SiO2)
mineral
Granite (Pink/Potassium-rich)
Pink Granite (contains K-Feldspar, Quartz, and Plagioclase)
igneous
Turquoise
Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O
mineral
Septarian Nodule (Septarian Dragon Stone)
Septarian Concretion (CaCO3 + Al2Si2O5(OH)4)
sedimentary
Chert (specifically Flint or Gray Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Granodiorite (Gneissic Pebble)
Granodiorite displaying minor foliation
igneous/metamorphic
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Shale
Shale (comprised mostly of clay minerals and quartz)
sedimentary
Geode with Iron-Stained Quartz/Calcite
Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3) in Sedimentary Matrix
sedimentary
Pyrite in Shale
Iron Disulfide (FeS2)
mineral
Anthracite Coal
Anthracite (Carbon-rich metamorphic sedimentary rock)
sedimentary
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Schist
Schist (Crystalline metamorphic rock)
metamorphic