Red Garnet
Pyrope-Almandine series (Mg3Al2(SiO4)3 to Fe3Al2(SiO4)3)
mineral
Category
Mineral Side Rock
Browse mineral side rock specimens identified by the Rock Identifier community.
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Petoskey Stone (Fossilized Rugose Coral)
Hexagonaria percarinata (Calcium Carbonate, CaCO3)
sedimentary
Smoky Quartz (Chlorite Inclusions)
Silicon Dioxide (SiO2) with trace Aluminum and Natural Irradiation
mineral
Amethyst
Amethyst (Silicon Dioxide - SiO2 with ferric impurities)
mineral
Citrine Quartz
Crystalline Silicon Dioxide (SiO2) with Ferric Iron impurities
mineral
Amethyst
Amethyst (Varietal of Quartz), SiO2 (Silicon Dioxide)
mineral
Amethyst
SiO2 (Amethyst is a variety of Quartz)
mineral
Amethyst
Quartz (Silicon Dioxide, SiO2) with iron impurities
mineral
Fluorite
Fluorite (CaF₂)
mineral
Basalt with Quartz Vein
Mafic volcanic rock with hydrothermal SiO2 filling
igneous
Sandstone
Arenite
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Gravel or Crushed Stone
Fragmented Aggregate Stone
sedimentary or igneous fragment
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Vuggy Quartz on Matrix
Crystalline Silicon Dioxide (SiO2)
mineral
River Rock / Stream Pebble
Fluvial Clast / Rounded Sedimentary Particle
Sedimentary Rock (possibly composed of various minerals)
Sandstone with Iron Banding
Arenite with Hematite or Limonite staining (SiO2 with Fe2O3)
sedimentary
Sandstone
Arenite (SiO2 dominant)
sedimentary
Sandstone
Arenite
Sedimentary
Red Sandstone
Arenite (primarily quartz with iron oxide cement)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone with Manganese Dendrites
Clastic Sedimentary Rock (SiO2 based with MnO2 inclusions)
sedimentary
Granite
Phaneritic plutonic rock (primarily Quartz, Feldspar, and Mica)
igneous
Sandstone
Arenite (primarily SiO2)
sedimentary
Pebble (likely Sandstone or Granitic Pebble)
Clastic Sediment (or specific rock type, e.g., Arenite, Granitoid Pebble)
Rock (likely Sedimentary)
Vesicular Basalt
Vesicular Basalt
igneous
Fluorite
Fluorite (Calcium Fluoride, CaF2)
Mineral
Sandstone (Wonderstone)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Red Sandstone
Sandstone (principally Quartz with Iron Oxide coating)
sedimentary
Note: Item is not a geological specimen
n/a
none
Not a geological specimen
N/A (man-made object)
N/A
Greywacke (likely)
Greywacke (a type of sandstone)
Sedimentary
Desert Rose (Baryte or Selenite variant)
Barium Sulfate (BaSO4) or Gypsum (CaSO4·2H2O) with Sand inclusions
mineral
Sandstone (with Iron Staining)
Clastic sedimentary rock (SiO2 with Fe2O3 oxides)
sedimentary
Pebble
Clast (specifically a granule or small pebble)
Sedimentary
Note: No specimen visible
N/A
Sandstone with Quartz Vein
Arenite with Crystalline Silica (SiO2)
sedimentary
Fluorite
Fluorite (Calcium Fluoride - CaF2)
mineral
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)
metamorphic
Sandstone
Sandstone (clastic sedimentary rock)
Rock
Sandstone
Quartz Sandstone (predominantly)
Sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral