Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Category
Synthetic (Not A Rock Or Mineral)
Browse synthetic (not a rock or mineral) specimens identified by the Rock Identifier community.
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Druzy Quartz on Chalcedony Matrix
Silicon Dioxide (SiO2)
mineral
Ironstone Concretion (Moqui Marble / Boji Stone)
Sedimentary Iron Oxide Concretion (Fe2O3 / FeO(OH))
sedimentary
Quartz Vein in Basalt or Porphyry
Silicate-veined volcanic rock
igneous
Druzy Quartz on Host Rock
Silicon Dioxide (SiO2)
mineral
Sandstone Pebble
Sandstone (Silicon dioxide-rich clastic sedimentary rock)
sedimentary
Rutilated Quartz
Quartz (SiO2) with Rutile inclusions (TiO2)
Mineral
Granite Pebbles
Granite (composed primarily of Quartz SiO2, Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8), and Mica)
igneous
Mixed Rock and Mineral Collection
Mixed Assemblage (includes Quartz, Jasper, Feldspar, and Turquoise-colored stones)
mineral
Sandstone
Clastic sedimentary rock (Quartz arenite)
sedimentary
Quartz-veined Basalt or Limestone Pebble
Quartz vein in host rock (Silicate mineral in carbonate or volcanic matrix)
sedimentary
Sandstone (lithic wacke)
Arenite / Lithic Wacke (mostly SiO2 with rock fragments)
sedimentary
Sandstone (likely Greywacke or Lithic Sandstone)
Arenite / Wacke
sedimentary
Quartz Geode (likely within Limestone or Dolomite matrix)
Quartz (SiO₂)
Mineral within a Sedimentary Rock
Sandstone or Weathered Conglomerate
Sedimentary Rock (Quartzose Sandstone / Lithic Arenite)
sedimentary
Generic Pebble
Lithic Fragment
sedimentary
Puddingstone
Conglomerate (specifically a type of jasper conglomerate or quartz conglomerate)
Sedimentary
Quartz River Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone and Gravel Aggregate
Clastic Sedimentary Rock / Quartzose Sandstone
sedimentary
Schist
Schist
metamorphic
Dalmatian Jasper
Peralkaline Quartz-Feldspar Rock with Arfvedsonite
igneous
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Quartz Druzy
Silicon Dioxide (SiO2)
mineral
Red Painted Rock
Artificial Coated Lithic Fragment
sedimentary
Sandstone
Clastic sedimentary rock
sedimentary
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Basalt with Quartz Vein
Mafic Igneous Rock (SiO2 filling)
igneous
Sandstone (Ferruginous)
Sandstone (primarily SiO2 with iron oxide Fe2O3 staining)
sedimentary
Tektite
Impactite (Natural Silicate Glass)
meteorite
Banded Igneous Dike Rock
Intrusive igneous rock with felsic/mafic banding
igneous
Quartz Vein in Sedimentary Rock
Silicon Dioxide (SiO2) with host Chert or Limestone
mineral
Sandstone
Clastic Sedimentary Rock
sedimentary
Wishing Stone (Basalt/Metabasalt with Quartz-Feldspar Vein)
Veined Metabasalt / Veined Greywacke
metamorphic
Sandstone
Sedimentary rock composed mainly of quartz sand
sedimentary
Banded Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Sandstone (Ferruginous)
Arenite with Iron Oxide (Limonite/Hematite) coating
sedimentary
Chrysocolla on Matrix
Hydrated copper silicates ((Cu,Al)2H2Si2O5(OH)4·nH2O)
mineral
Smoky Quartz and Chalcedony Geode Fragment
Silicon Dioxide (SiO2)
mineral
Quartz Druzy
Crystalline Silicon Dioxide (SiO2)
mineral
Tumbled Stone
Silicon dioxide / Various silicates
mineral