Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Category
Mineral Like Biological Tissue
Browse mineral like biological tissue specimens identified by the Rock Identifier community.
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Green Chert
Microcrystalline Quartz (SiO2)
sedimentary
Chalcedony (Agate / Quartz Pebble)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Sandstone
Arenite (Sedimentary Rock)
sedimentary
Lepidolite in Pegmatite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lepidolite)
metamorphic
Geode (Unopened)
Silicon dioxide with various inclusions (SiO2)
sedimentary
Azurite in Matrix
Azurite (Cu3(CO3)2(OH)2) in Rhyolite or Sandstone matrix
mineral
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Garnet
Garnet Group (Silicate Minerals)
mineral
Granite
Granite (Plutonic Igneous Rock)
igneous
Granite Gravel / Crushed Granite
Plutonic Felsic Igneous Rock
igneous
Vanadinite
Pb5(VO4)3Cl
mineral
Gastropod Fossil (Snail Stone or Steinkern)
Class Gastropoda (Calcium Carbonate - CaCO3 / Silica - SiO2 replacing original shell)
sedimentary
Fossilized Shark Tooth (Otodus obliquus)
Otodus obliquus (Mineral: Fluorapatite)
mineral
Vanadinite
Lead Chlorovanadate - Pb5(VO4)3Cl
mineral
Amygdaloidal Basalt with Quartz/Zeolite Infill
Amygdaloidal Basalt (extrusive volcanic rock with SiO2 or CaAl2Si3O10·3H2O infill)
igneous
Desert Rose (Sand Barite/Gypsum Rose)
Barium Sulfate (BaSO4) or Hydrated Calcium Sulfate (CaSO4·2H2O)
mineral
Amygdaloidal Basalt
Amygdaloidal Basalt
igneous
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Diorite (Salt and Pepper Rock)
Diorite
igneous
Sandstone
Arenite (primarily SiO2)
sedimentary
Red Sandstone
Arenite (SiO2 with Fe2O3)
sedimentary
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Serpentine
Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Fossilized Brachiopod
Brachiopoda (Phylum)
fossil
Bornite
Cu5FeS4
mineral
Lepidolite Ore
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Specular Hematite
Hematite (Fe2O3)
mineral
Mica Schist
Mica Schist (primarily Muscovite or Biotite KAl2(AlSi3O10)(OH)2)
metamorphic
Vesicular Basalt
Amygdaloidal Basalt (Mafic extrusive volcanic rock)
Igneous
Uraninite (Pitchblende)
Uranium dioxide (UO2)
mineral
Man-made Synthetic Material (Costume Faux Fur)
Synthetic Polymer (Polyester/Acrylic)
not a rock
Hematite
Iron(III) oxide (Fe2O3)
mineral
Quartz (possibly Citrine or Smoky Quartz variety)
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Fossilized Shark Tooth
Elasmobranchii gen. sp. indet. (Calcium Phosphate - Ca5(PO4)3(OH,F,Cl))
fossil
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Schist
Mica Schist
metamorphic
Diorite (Dalmatian Stone variant)
Phaneritic Intermediate Plutonic Rock (Diorite)
igneous