Scoria (Lava Rock)
Vesicular Basalt / Scoria
igneous
Category
Sedimentary And Igneous
Browse sedimentary and igneous specimens identified by the Rock Identifier community.
Learn about Sedimentary And Igneous in the encyclopedia
View all →
Pink Granite
Felsic intrusive igneous rock (Quartz, K-feldspar, Plagioclase)
igneous
Granite
Phaneritic Plutonic Felsic Rock
igneous
Quartz (Float/Abraded)
Quartz (SiO₂)
Mineral
Schist
Schist (various mineralogical compositions including mica, chlorite, talc, etc.)
Metamorphic
Pyrite
Iron Pyrite (FeS2)
mineral
Marble
Marbles are primarily composed of calcite (calcium carbonate, CaCO3) or dolomite (calcium magnesium carbonate, CaMg(CO3)2).
Metamorphic Rock
Yellow Chalcedony
Chalcedony (a cryptocrystalline variety of Quartz, SiO₂)
Mineral
Smoky Quartz
SiO2 (Silicon Dioxide)
Mineral
Amethyst
Quartz (SiO2) variety
Mineral
Calcite
Calcite (CaCO₃, Calcium Carbonate)
Mineral
Gabbro
Coarse-grained Intrusive Mafic Igneous Rock
igneous
Mica-rich Pegmatite
Pegmatite (rich in Muscovite and Biotite)
igneous
Schorl (Black Tourmaline) in Granite
NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
igneous
Granite Cobble
Granite (Felsic Intrusive)
igneous
Pegmatite
Granitic Pegmatite
igneous
Basalt River Stone
Aphanitic Mafic Igneous Rock (Basalt)
igneous
Sedimentary Breccia
Breccia (Clastic Sedimentary Rock)
sedimentary
Granite
Granite (a common term for a felsic intrusive igneous rock)
igneous
Granite
Granite (a plutonic igneous rock composed primarily of quartz, feldspar, and mica)
igneous
Quartz, Sandstone, and Siltstone specimens
Silicon Dioxide (SiO2) and Clastic Sedimentary Rocks
mineral and sedimentary
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Granite
Phaneritic Felsic Igneous Rock
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Pink Granite
Granite (Phaneritic Igneous Rock)
igneous
Breccia
Sedimentary Breccia
sedimentary
Sandstone
Sedimentary Arenite
sedimentary
Concretion
Sedimentary Concretion
sedimentary
Breccia Pebble
Sedimentary Breccia
sedimentary
Sandstone Concretion
Sedimentary concretion
Sedimentary
Sandstone or Limestone
Sedimentary Rock
Sedimentary
Quartz (Smoky Quartz with inclusions)
Silicon Dioxide (SiO2)
mineral
Blue Sapphire
Corundum (Al2O3 with trace amounts of Fe and Ti)
gemstone
Potassium Feldspar (Orthoclase / Microcline)
KAlSi3O8
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz with Iron Oxide Staining
Silicon Dioxide (SiO2)
mineral
Faceted Quartz or Cubic Zirconia
SiO2 (Quartz) or ZrO2 (Cubic Zirconia)
gemstone
Blue Apatite
Fluorapatite / Apatite Group (Ca5(PO4)3(F,Cl,OH))
mineral
Raw Garnet (Hessonite / Spessartine)
Silicate mineral group (X3Y2(SiO4)3)
gemstone
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Rough Apatite in Matrix
Fluorapatite / Chlorapatite / Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Yellow Quartz (Golden Quartz)
Silicon Dioxide (SiO2)
mineral