Granitoid (Granitic Rock)
Granitoid (Quartzo-feldspathic plutonic rock)
igneous
Category
Man Made Material (Simulated Mineral)
Browse man made material (simulated mineral) specimens identified by the Rock Identifier community.
Basalt with Vesicular Surface
Basalt (Mafic Extrusive)
igneous
Chalk / Sedimentary Limestone
Calcium Carbonate (CaCO3) - Biogenic Sedimentary Rock
sedimentary
Quartz Crystal
Quartz (SiO₂)
Mineral
Chert (specifically Red Chert or Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
N/A (Non-Geological Object)
N/A
Mahogany Obsidian
Volcanic Glass with Hematite/Magnetite inclusions (SiO2 + Fe2O3)
Igneous
Quartzite Arrowhead (Archaeological Lithic)
Recrystallized Quartz (SiO2)
metamorphic
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Quartzite Pebbles
Quartzite (SiO2)
metamorphic
Veined Pebble (likely a Quartz-Veined Pebble)
Pebble with Mineral Vein (e.g., Quartz Vein in a Chert/Mudstone Pebble)
Sedimentary Rock (possibly conglomerate or breccia with a quartz vein)
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Yellow Quartzite
Quartzite (SiO2)
metamorphic
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Quartzite (River Cobble)
Quartzite (SiO2)
metamorphic
Apatite
Fluorapatite, Chlorapatite, and Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Chert (Yellow Jasper/Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Serpentinite
Serpentinite (composed mainly of Group: Serpentine; (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)
metamorphic
Orange Quartz with Hematite inclusions
Quartz (SiO2) with Hematite (Fe2O3) inclusions
Mineral
Chert (Quartz)
Microcrystalline Silica (SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Chert (with Chalky Cortex)
Silicon Dioxide (SiO2)
sedimentary
Granite
Granite (Phaneritic Igneous Rock)
igneous
Granite Pebble
Igneous Intrusive Rock (Quartz-Feldspar-Mica Phenocrysts)
igneous
Green Slag Glass (Cullet)
Amorphous Silica (Industrial Glass Byproduct)
Synthetic/Byproduct (Non-igneous, non-sedimentary, non-metamorphic)
Orange Quartzite (River Pebble)
Quartzite (SiO2 with iron oxide impurities)
metamorphic
Chert (Black Chert/Flint)
Silicon Dioxide (SiO2)
sedimentary
Fossiliferous Limestone
Calcite-rich Sedimentary Rock (CaCO3)
sedimentary
Coquina / Shelly Limestone
Bioclastic Limestone (composed of CaCO3)
sedimentary
Chert / Flint Nodule
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Quartz Variety)
Chert (Silicon Dioxide, SiO2)
sedimentary
Chert / Flint (with quartz or calcite inclusion)
Silicon dioxide (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Rutilated Quartz
Quartz (SiO2) with Rutile Inclusions (TiO2)
Mineral
Labradorite (a variety of Feldspar)
Labradorite; (Na,Ca)(Al,Si)4O8 (a plagioclase feldspar)
igneous
Ironstone Concretion / Limonite Node
Ferruginous Sedimentary Rock (composed primarily of Limonite FeO(OH)·nH2O and Goethite)
sedimentary
Jasper (Mookaite style)
Silicon Dioxide (SiO2) with iron and manganese inclusions
sedimentary