Schist with Quartz/Mica
Mica Schist (primarily Muscovite and Quartz)
Metamorphic
Category
Man Made Material (Jewelry, Metal Alloy)
Browse man made material (jewelry, metal alloy) specimens identified by the Rock Identifier community.
Crazy Lace Agate
Silicon Dioxide (SiO2) with iron and aluminum inclusions
sedimentary mineral
Mookaite Jasper
Silicified Radiolarite (SiO2 with impurities)
sedimentary
Ironstone Concretion / Limonite Node
Ferruginous Sedimentary Rock (composed primarily of Limonite FeO(OH)·nH2O and Goethite)
sedimentary
Quartz (Common or Milky)
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Red Sandstone
Arenite (ferruginous sandstone)
sedimentary
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Sandstone (Water-worn Pebble)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Siltstone/Sandstone (possibly Wonderstone or Picture Sandstone)
Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide inclusions)
Sedimentary
Quartz with Mica/Chlorite inclusions
Silicon Dioxide (SiO2) with phyllosilicate inclusions
igneous/metamorphic mineral specimen
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Granite with Epidote
Granite, containing quartz, feldspar, and epidote
Igneous
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite (River Pebble)
Metamorphosed Quartz-rich Sandstone (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide cement)
sedimentary
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone (Quartz Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Iron Slag
Ferrous Slag (complex silicate and oxide byproduct)
industrial byproduct (anthropogenic)
Granite
Granite (Felsic Plutonic Rock)
igneous
Granite
Plutonic felsic igneous rock
igneous
Quartzite
Quartzite (primarily SiO2)
metamorphic
Basalt (Water-worn pebble)
Mafic Igneous Rock (primarily Plagioclase feldspar and Pyroxene)
igneous
Marble
Marble (primarily Calcite, CaCO3 or Dolomite, CaMg(CO3)2)
Metamorphic Rock
Basalt
Basalt (Mafic volcanic rock)
igneous
Arsenopyrite with Quartz
Arsenopyrite (FeAsS)
mineral
Banded Gneiss (River Cobble)
Gneiss (a high-grade metamorphic rock)
metamorphic
Chert (Common Opal/Agate inclusion)
Microcrystalline Quartz (SiO2)
sedimentary
Schist
N/A (a rock type, not a mineral formula)
metamorphic
Serpentine
Serpentine-group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al,Fe)2O5(OH)4)
metamorphic
Soapstone
Steatite (composed primarily of Talc: Mg3Si4O10(OH)2)
metamorphic
Limestone (specifically Travertine or Tufa)
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (with potential mineral inclusions)
Clastic sedimentary rock (primarily Quartz, SiO2)
sedimentary
Granite
Course-grained intrusive igneous rock
igneous
Granite River Rock
Phaneritic Felsic Igneous Rock (Granite)
igneous