Fossiliferous Chert (with Fossil Shells)
Silicon Dioxide (SiO2) with biogenic inclusions
sedimentary
Category
Not A Geological Specimen
Browse not a geological specimen specimens identified by the Rock Identifier community.
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Oak-grain Laminate (Industrial/Decorative Furniture Finish)
Melamine Resin-impregnated Decorative Paper on Particleboard (Cellulose/Thermosetting Plastic)
not a rock (synthetic material)
Quartzite River Cobble
Quartzite (SiO2)
metamorphic
Quartz on Sandstone
Silicon Dioxide (SiO2) in Lithic Sandstone
sedimentary
Basalt with Quartz Veining
Basalt (SiO2-rich veins)
igneous
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Banded River Cobble with Mafic Dike
Hydrothermally altered Graywacke or Sandstone with Mafic Intrusion
igneous and sedimentary
Basalt with Quartz Vein
Mafic volcanic rock with hydrothermal SiO2 filling
igneous
Geode with Quartz and Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Quartz on Host Rock
Silicon Dioxide (SiO2)
mineral
Unknown Rock Specimen
igneous
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Painted Pet Rock (Quartzite/Sandstone base)
Silicon Dioxide (SiO2) with anthropomorphic acrylic embellishments
sedimentary
Sandstone with Quartz Vein
Arenite with SiO2 intrusion
sedimentary
Sandstone with Concretions / Liesegang Rings
Arenite with iron oxide banding
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Cullet Glass (Slag)
Amorphous Silicon Dioxide (Man-made)
Mineraloid
Glauconite (Greensand Articulated Sandstone)
Glauconite ((K, Na)(Fe, Al, Mg)2(Si, Al)4O10(OH)2)
sedimentary
Kidney Stone
Nephrolithiasis (Calcium Oxalate, Hydroxyapatite, or Uric Acid)
mineral
Borosilicate Glass (Manufactured)
SiO2 + B2O3 (Silicon dioxide and Boron trioxide)
Synthetic/Amorphous Solid
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
mineral
Quartz Geode with Calcite
Silicon Dioxide (SiO2) and Calcium Carbonate (CaCO3)
Mineral/Geode
Quartz with inclusions
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Brecciated Quartzite
Brecciated Quartzite
Metamorphic
Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz
Silicon dioxide (SiO2)
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions (Limonite/Hematite)
mineral
Ferruginous Sandstone (Gozzan)
Iron-rich clastic sedimentary rock with Limonite/Goethite
sedimentary
Tektite (Indochinite)
Tektite (High-silica impact glass)
igneous
Granitoid (with Epidote and Orthoclase)
Crystalline Felsic Intrusive Rock (containing SiO2, KAlSi3O8, and Ca2(Al2,Fe)(Si2O7)(SiO4)O(OH))
igneous
Amygdaloidal Basalt
Amygdaloidal Basalt
igneous
Lemon (Mock specimen mimicking Citrine/Sulfur)
Citrus x limon
Organic (Biological specimen)
Grass (Organic Matter/Soil)
Poaceae (family of monocotyledonous flowering plants)
Organic Materia (Not a rock or mineral)
Quartz Vein in Metamorphic Rock
Quartzite or Schist host with Quartz (SiO2) intrusion
metamorphic
Quartz Geode
Crystalline Silica (SiO2)
mineral
Yellow Quartz or Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Snow)
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Concretion with Geode Cavity
Ferruginous Sandstone Concretion with Quartz Center
sedimentary
Sandstone (Banded)
Clastic sedimentary rock (primarily SiO2)
sedimentary