Botryoidal Chalcedony (Agate/Desert Rose Chalcedony)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Category
Industrial Byproduct (Often Confused With Igneous Rocks Or Meteorites)
Browse industrial byproduct (often confused with igneous rocks or meteorites) specimens identified by the Rock Identifier community.
Learn about Industrial Byproduct (Often Confused With Igneous Rocks Or Meteorites) in the encyclopedia
View all →
Pink Orthoclase Feldspar with Dendrites
Orthoclase (KAlSi3O8) with Manganese Oxide dendrites
mineral
Black Tourmaline (Schorl)
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Granitic Pegmatite
Pegmatitic Granite
igneous
Quartzite pebble
Quartzite (SiO2)
metamorphic
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
mineral
Blue Sapphire
Corundum (Al2O3)
mineral
Amethyst
SiO2 (Silicon Dioxide)
Mineral
Marble
Recrystallized Limestone (CaCO3)
metamorphic
Basalt pebble
Basalt
igneous
Smoky Quartz
Smoky Quartz (SiO2)
Mineral
Ferruginous Conglomerate (or Iron-Rich Concrete/Slag)
Clastic Sedimentary (Silicon Dioxide/Iron Oxide matrix)
sedimentary
Moldavite
Silica glass with small amounts of aluminum, iron, and other elements
Mineraloid / Tektite
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Rough Quartz
Silicon Dioxide (SiO2)
mineral
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Agate (Chert/Chalcedony)
Silicon Dioxide (SiO2)
mineral
Basalt
Basalt
igneous
Basalt
Basalt
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Clear or Milky)
Silicon Dioxide (SiO2)
mineral
Epidote in Matrix (Dragon Stone variant)
Epidote with Quartz/Feldspar (Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Heliotrope (Bloodstone)
Cryptocrystalline Quartz (SiO2) with inclusions of Hematite (Fe2O3)
mineral
Sodalite
Sodalite - Na8(Al6Si6O24)Cl2
mineral
Pegmatite (Granitic)
Granite Pegmatite
igneous
Quartzite (River Pebble)
Metamorphic rock consisting primarily of Quartz (SiO2)
metamorphic
Serpentine
Serpentine group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al)2O5(OH)4)
metamorphic
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Basalt and Andesite Gravel
Aphanitic Mafic-Intermediate Volcanic Rock
igneous
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Blue Sapphire
Corundum (Al2O3 with Cr, Fe, and Ti trace elements)
gemstone
Carnelian (Chalcedony variety)
SiO2 (Silicon Dioxide)
Mineral
Sandstone (Quartz-rich)
Arenite (primarily SiO2)
sedimentary
Quartz
Quartz (SiO2)
Mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral