Shale
Shale
sedimentary
Category
Mineral, Sediment
Browse mineral, sediment specimens identified by the Rock Identifier community.
Unidentified Rock Fragment
Unknown
Rock
Quartz
Quartz (SiO₂)
Mineral
Jasper (Banded Jasper)
Silicon Dioxide (SiO2) with impurities
sedimentary
Poppy Jasper
Jasper (variety of Chalcedony), SiO2 (Silicon Dioxide)
sedimentary
Red Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Jasper
Silicon Dioxide (SiO2) - Jasper (Microcrystalline Quartz)
sedimentary
Fossiliferous Sedimentary Rock (Coquina/Limestone)
Fossiliferous Calcarenite / Bioclastic Limestone
sedimentary
Jasper (Red Jasper with Quartz veins)
Jasper (Silicon Dioxide, SiO2)
sedimentary
Jasper and Basalt (Mixed Breccia or Chert)
Silicon Dioxide (SiO2) with Ferromagnesian silicates
sedimentary and igneous (mixed)
Red Jasper with Quartz
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Chert (Basanite variety) with Quartz Vein
Microcrystalline Quartz (SiO2)
sedimentary
Granite (Background) and Quartzite/River Pebble (Foreground Heart)
Phaneritic Felsic Igneous Rock (Granite background)
igneous
Coral (Precious Coral)
Corallium rubrum (Red Coral), Paracorallium japonicum (Momo Coral), Pleurocorallium elatius (Sardinian Coral), various other species within the Corallidae family. Chemically, it's primarily Calcium Carbonate (CaCO 3 ).
Mineral, Organic Gemstone
Hematite
Hematite (Fe2O3)
mineral
Jasper
Silicon dioxide (SiO2)
sedimentary
Red Jasper
Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)
sedimentary
Siltstone
Siltstone (primarily SiO2 with Al2O3 and Fe2O3)
sedimentary
Limestone (specifically Dolomitic/Crystalline Limestone)
Sedimentary Carbonate Rock (CaCO3 / CaMg(CO3)2)
sedimentary
Jasper
Jasper (SiO2 plus impurities)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide impurities (Hematite)
sedimentary
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
African Turquoise (Jasper)
Polychrome African Jasper (often marketed as 'African Turquoise' due to its color, but it is not true turquoise)
Rock
Biotite Mica
K(Mg,Fe)3AlSi3O10(OH)2
Mineral in a matrix (likely quartz or feldspar)
Aventurine (likely Green Aventurine)
Silicon Dioxide (SiO2) with included minerals (Fuchsite for green)
Metamorphic Rock / Mineral (Quartz Variety)
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
Sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Fuchsite Quartzite
Fuchsite-bearing Quartzite
Metamorphic
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary (or mineraloid)
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Red Jasper (Quartzite conglomerate)
Silicon dioxide (SiO2) with Iron inclusions
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Conglomerate (Puddingstone)
Conglomerate (specifically, clastic sedimentary rock)
Sedimentary
Mookaite Jasper
Siliceous (chert) sedimentary rock, a form of Jasper
Sedimentary
Ocean Jasper (Orbicular Jasper)
Silicon Dioxide (SiO2)
Sedimentary Rock
Sandstone (Pebble)
Sandstone (arenite, arkose, wacke depending on composition)
sedimentary
Red Jasper or Chert
Jasper (SiO2, a variety of chalcedony with iron oxide impurities), Chert (SiO2)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Jasper
Silicon Dioxide (SiO2)
sedimentary