Yellow Aventurine
Quartz (SiO2) with inclusions
mineral
Category
Mineral Composite
Browse mineral composite specimens identified by the Rock Identifier community.
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Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in matrix
mineral
Limonite
FeO(OH)•nH2O
mineral
Amazonite
K(AlSi3O8) - Microcline
mineral
Epidote
Ca2(Al, Fe)3(SiO4)3(OH)
mineral
Andesite Porphyry (Geological Drill Core)
Andesite Porphyry
igneous
Carved Stone Turtle
Carved Soapstone and Quartz
mineral
Silver
Ag (Native Silver)
mineral
Concretion
Sedimentary Concretion
sedimentary
Satin Spar Selenite
Gypsum (CaSO4·2H2O)
mineral
Yellow Ochre (Limonite)
Limonite (FeO(OH)·nH2O)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Quartz with inclusions
SiO2
mineral
Limestone (or Sandstone)
Calcium Carbonate (CaCO3) / Silica (SiO2)
sedimentary
Slate
Foliated Metamorphic Rock (composed mainly of clay minerals or micas)
metamorphic
Granitic Pegmatite with Graphic Texture
Graphic Granite (alkali feldspar and quartz intergrowth)
igneous
Phantom Quartz (Chlorite Inclusion)
Silicon Dioxide (SiO2) with Chlorite (Mg,Fe,Al)6(Si,Al)4O10(OH)8
mineral
Moss Agate
Silicon Dioxide (Chalcedony with green mineral inclusions), SiO2
gemstone
Tektite
Natural impact glass
meteorite
Green Quartz
Silicon Dioxide (SiO2)
mineral
Fluorite
Calcium fluoride (CaF2)
mineral
Sandstone / Limestone
Sedimentary Rock (Quartz Sandstone or Calcareous Grainstone)
sedimentary
Granite
Felsic intrusive igneous rock
igneous
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Olivine (Peridot when gem-quality)
Olivine Group (Magnesium Iron Silicate, (Mg,Fe)2SiO4)
mineral
Shale or Siltstone
Sedimentary Clastic Rock (Variable mineral composition including quartz and clay minerals)
sedimentary
Sandstone
Arenite
sedimentary
Pyrite in Quartz
FeS2 (Iron Pyrite) with SiO2 (Quartz)
Mineral/Igneous/Hydrothermal
Polished orbicular jasper (likely ocean jasper)
Jasper, a microcrystalline variety of quartz (SiO₂), with iron-oxide and other mineral inclusions
mineral
Serafina (Serafinite / Clinochlore)
Clinochlore (Mg5Al)(AlSi3O10)(OH)8
mineral
Septarian Nodule
Septarian Concretion (Calcite, Aragonite, and Limestone)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Petrified Wood
Silicified Wood (SiO2 / Quartz pseudomorph after wood)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Sandstone (Fluvial Pebble)
Arenite
sedimentary
Red Sandstone
Arenite (with Iron Oxide)
sedimentary
Azurite
Azurite (Cu3(CO3)2(OH)2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Hematite
Iron (III) Oxide (Fe2O3)
mineral
Glacial Cobbles (predominantly Granite and Gneiss)
Mixed lithologies (Quartz, Feldspar, Mica assemblage)
igneous and metamorphic
Banded Sandstone (River Pebble)
Clastic Sedimentary Rock (SiO2 with impurities)
sedimentary
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral