Sandstone
Arenite (SiO2 predominantly)
sedimentary
Category
Mixed (Predominantly Sedimentary And Igneous)
Browse mixed (predominantly sedimentary and igneous) specimens identified by the Rock Identifier community.
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Sodalite
Sodalite: Na8(Al6Si6O24)Cl2
mineral
Granite (Pink/Red Granite)
Phaneritic Felsic Igneous Rock
igneous
Mixed river gravel, prominently iron-stained chert/jasper
Microcrystalline quartz (SiO₂), chiefly chert/jasper with iron-oxide staining; mixed clasts may include quartzite and other silicates
sedimentary
Jasper and Mixed River Pebbles
Microcrystalline Quartz (Chalcedony / Jasper)
sedimentary
Colorless faceted gemstone (likely cubic zirconia)
Cubic zirconia, zirconium dioxide (ZrO₂); possibly synthetic quartz or glass imitation
gemstone
Mixed Tumbled Gemstones (Agate, Aventurine, Pyrite, etc.)
Multiple (principally Silicon Dioxide SiO2 and Iron Disulfide FeS2)
mineral
Tumbled Carnelian and Quartz Mix
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Chrysanthemum Stone
Limestone with Celestite or Andalusite inclusions
sedimentary
Granite with Quartz/Pegmatite
Intrusive Igneous Rock
igneous
River Pebbles (White Quartz and Basalt mix)
Mixed Clastic Sedimentary Assemblage (SiO2 and Mafic Volcanics)
sedimentary
Ocean Jasper
Orbicular Jasper / Silicate
Mineral
Carnelian
Carnelian (Silicon Dioxide, SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Polished/tumbled metallic sulfide specimen, likely pyrite
Pyrite (FeS₂), possibly mixed with chalcopyrite or other sulfides
mineral
K-Feldspar (Microcline / Orthoclase)
Potassium Feldspar (KAlSi3O8)
mineral
Rutilated Quartz
Rutile in Quartz (SiO2 with TiO2 inclusions)
mineral
Citrine
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 predominantly)
sedimentary
Sandstone (Common Quartz Pebble/Rock)
Sedimentary rock / Quartz arenite
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Conglomerate (Greenstone/Pebble Conglomerate)
Polymictic Conglomerate
sedimentary
Colorless faceted gemstone, likely cubic zirconia
Synthetic cubic zirconia (zirconium dioxide, ZrO₂); identity is visual and not definitive
gemstone
Leopardite
Quartz porphyry / Quartz monzonite with manganese oxide spots
igneous
Sodalite
Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2)
mineral
Jasper and Basalt (Mixed Breccia or Chert)
Silicon Dioxide (SiO2) with Ferromagnesian silicates
sedimentary and igneous (mixed)
Sandstone
Sandstone (SiO2 rich)
sedimentary
Copper Ore Specimen
Cupriferous Rock / Malachite-bearing ore
mineral
Limonite
FeO(OH)·n(H2O)
mineral
Carnelian
Carnelian (Silicon Dioxide - SiO2)
mineral
Unakite (or Epidote-rich Granite)
Unakite (Metamorphosed Granite consisting of Epidote, Orthoclase, and Quartz)
metamorphic
Mixed Quartz and River Pebbles (Stone Collection)
Mixed assortment containing mainly Silicon Dioxide (SiO2)
igneous, sedimentary, metamorphic, and mineral
Granite
Intrusive Igneous Rock
igneous
Granite Pebble
Intrusive Igneous Rock
igneous
Unidentifiable Specimen
Undetermined
Unknown
Que Sera Stone (Llanite)
Rhyolite containing blue quartz and feldspar
igneous
Sandstone
Quartz Sandstone (predominantly)
Sedimentary
Granite
Granite (Phaneritic Igneous Rock)
igneous
Citrine
Silicon dioxide (SiO2)
mineral
Labradorite
(Na, Ca)(Si, Al)4O8
mineral
Sandstone
Arenite (predominantly SiO2)
sedimentary
Banded gneiss (likely garnet-biotite or quartz-feldspar gneiss)
Gneiss; predominantly quartz (SiO₂), feldspar, and dark biotite/amphibole
metamorphic