Carnelian (Carnelian Agate)
Silicon dioxide (SiO2) - a variety of Chalcedony
Category
Browse mineral side rock specimens identified by the Rock Identifier community.
Carnelian (Carnelian Agate)
Silicon dioxide (SiO2) - a variety of Chalcedony
Crazy Lace Agate
Silicon Dioxide (SiO2) - Chalcedony variety
Chevron Amethyst
Silicon Dioxide (SiO2) with iron impurities
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Tumbled Carnelian and Quartz Mix
Silicon Dioxide (SiO2) with iron oxide impurities
Agate
Agatized Chalcedony (SiO2)
Pink Tumbled Agate
Silicon Dioxide (SiO2) with dye
Rose Quartz
Rose Quartz (SiO2 with traces of Titanium, Iron, or Manganese)
Milky Quartz
Silicon Dioxide (SiO2)
Banded Agate
Agate (Cryptocrystalline variety of Quartz, SiO2)
Labradorite (Feldspar)
Labradorite, (Ca,Na)(Al,Si)4O8
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(F,OH)2
Peridot in Basalt
Olivine ((Mg, Fe)2SiO4) in Basalt
Green Banded Agate
Agate (Variety of Chalcedony/Quartz), SiO2
Blue Sapphire
Corundum (Al2O3)
Carnelian
Carnelian (variety of Chalcedony, SiO2)
Banded Agate
Microcrystalline Quartz (SiO2) with impurities
Ferruginous Quartz (Carnelian-tinted Quartz)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Serpentinite (with Pyrite/Garnet inclusions)
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3Si2O5(OH)4
Blue Dyed Agate Slice
Silicon Dioxide (SiO2) with artificial pigment
Larimar
Pectolite [NaCa2Si3O8(OH)] with copper substitution
Quartz Geode in Sedimentary Matrix
Silicon Dioxide (SiO2) within a limestone/dolostone host
Granite (River Pebble)
Phaneritic intrusive igneous rock (Felsic)
Basalt
Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
Basalt Pebble
Aphanitic Mafic Igneous Rock
Anthracite Coal
Anthracite (a variety of coal, predominantly carbon)
Agate
SiO2 (Silicon dioxide, chalcedony variety)
Granite
Granite (Mainly Quartz, Feldspar, and Mica/Amphibole)
Biotite Schist
Biotite-rich Schist (K(Mg,Fe)3AlSi3O10(OH,F)2)
Black Beauty Meteorite
NWA 7034 (Northwest Africa 7034)
Basalt with Vesicular Surface
Basalt (Mafic Extrusive)
Granite Pegmatite
Phaneritic Plutonic Igneous Rock
Concretion in Shale
Siltstone/Shale with Siderite or Calcareous concretions
Quartz (Clear Quartz)
Silicon Dioxide (SiO2)
Gneiss
Gneiss (High-grade metamorphic rock)
Greenstone
Metabasalt (Greenstone Facies)
Milky Quartz
Silicon Dioxide (SiO2)
Garnet (Almandine/Pyrope series)
Garnet Group - X3Y2(SiO4)3
Thunderegg
Agate-filled Rhyolitic Nodule (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Herkimer Diamond (Quartz Crystal)
Silicon Dioxide (SiO2)
Moss Agate
Chalcedony (Silicon Dioxide / SiO2)