Granite
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Category
Mineral Variant
Browse mineral variant specimens identified by the Rock Identifier community.
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Schist
Schist (containing Quartz, Mica, and Amphibole)
metamorphic
Sandstone (lithic/quartz variant)
Clastic sedimentary rock (SiO2 predominant)
sedimentary
Red Moss Agate (Jasper)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Sandstone (Red Arkose)
Sandstone (Arkose variant, primarily SiO2 with KAlSi3O8)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Banded Agate (Onyx variant)
Silicon dioxide (SiO2)
sedimentary
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with Iron inclusions)
Mineral
Chert / Flint Nodules in Limestone
Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)
sedimentary
Tiger's Eye (variations include Blue or Hawk's Eye)
Silicon Dioxide with Crocidolite inclusions (SiO2)
Metamorphic mineral
Chalcedony (Agate/Carnelian variant)
Silicon Dioxide (SiO2)
mineral
Likely basalt pebble
Basalt; fine-grained mafic volcanic rock, chiefly plagioclase and pyroxene with possible olivine
igneous
Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Quartz (Herkimer Diamond variant)
Silicon Dioxide (SiO2)
mineral
Chalcedony Pebble (Carnelian / Quartz Pebble)
Silicon Dioxide (SiO2)
mineral
Chert (and Flint variant)
Chert (SiO2)
sedimentary
Granite
Granite (Mainly Quartz, Feldspar, and Mica)
igneous
Porphyry (Flower Stone)
Porphyritic Basalt or Andesite
igneous
Rough Blue Diamond
Carbon (C)
mineral
Dyed Crackle Quartz (Green)
Quenching-treated Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Milky/Rose Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Rose Quartz or Chert variant)
Silicon Dioxide (SiO2)
mineral
Aqua Aura Quartz
Titanium/Gold-coated Silicon Dioxide (SiO2)
mineral
Granite
Phaneritic Plutonic Igneous Rock (Granite)
igneous
Quartz (Smoky Quartz variant)
Silicon Dioxide (SiO2)
mineral
Chert (variant Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Amethyst
Silicon dioxide (variant with ferric iron impurities), SiO2
mineral
Granite
Phaneritic Igneous Rock (Granite)
igneous
Serpentine
Serpentine group (Mg,Fe,Ni,Al,Zn,Mn)3(Si,Fe,Al)2O5(OH)4
metamorphic
Granite
Felsic Plutonic Rock
igneous
Granite
Granite (a phaneritic intrusive igneous rock)
igneous
Bauxite (Iron-stained Chert / Ironstone Aggregate)
Hydrous aluminum oxide mixture (mainly Gibbsite Al(OH)3, Boehmite γ-AlO(OH), and Goethite α-Fe3+O(OH))
sedimentary
Quartz (Herkimer Diamond variant)
Silicon Dioxide (SiO2)
mineral
Quartz (Smoky Quartz variant)
Silicon Dioxide (SiO2)
mineral
Chalcedony (Agate/Carnelian variant)
Silicon Dioxide (SiO2)
mineral
Granite (Micro-specimen)
Plutonic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Limestone (Travertine/Tufa variant)
Calcium Carbonate (CaCO3)
sedimentary
Botryoidal Chalcedony Geode
Silicon Dioxide (SiO2) - Chalcedony / Cryptocrystalline Quartz
mineral
Fossilized Tiger Shark Tooth
Galeocerdo cuvier (fossilized hydroxylapatite)
sedimentary
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral