Chert (Flint Nodule)
Silicon Dioxide (SiO2)
sedimentary
Category
Mineral Variant
Browse mineral variant specimens identified by the Rock Identifier community.
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Quartzite (specifically Milky Quartz variety)
Quartz (SiO2)
metamorphic
Green Slate or Metamorphic Rock with Moss/Lichen
Metamorphic rock / Phyllite or Slate variant
metamorphic
Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Biological Bone (Patella/Knee)
Patella (part of the Human Skeletal System)
Organic Structure (Not a Rock)
Black Onyx
Silicon Dioxide (SiO2) - Chalcedony variant
mineral
Rose Quartz / Iron-stained Quartz
SiO2 (Silicon Dioxide)
mineral
Desert Rose (Gypsum Rose)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Sandstone
Arenite (Siliclastic sedimentary rock)
sedimentary
Tiger's Eye
Silicon Dioxide (SiO2) with Limonite/Goethite pseudomorphs after Crocidolite
Mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Carnelian
SiO2 (Silicon Dioxide - Chalcedony variant)
mineral
Agate
Silicon Dioxide (SiO2) - Chalcedony variant
mineral
Quartzite
Quartzite (High-purity SiO2)
metamorphic
Granite (Dioritic variant)
Phaneritic Felsic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Vesicular Basalt (Amygdaloidal)
Amygdaloidal Basalt (Mafic volcanic rock)
igneous
Magnetite (Lodestone variant potential)
Magnetite (Fe3O4)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Red Moss Agate (Jasper)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Red Sandstone
Clastic Sandstone (typically Quartz-rich with Iron Oxide)
sedimentary
Tiger's Eye (dark/grey variant)
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Labradorite
(Ca,Na)(Al,Si)4O8
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with Iron inclusions)
Mineral
Quartz (Druzy or Chalcedony variant)
Silicon Dioxide (SiO2)
mineral
Orthoclase (Potassium Feldspar)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Carnelian Agate
SiO2 (Silicon Dioxide - Chalcedony variant)
gemstone
Epidosite with Quartz (Unakite-variant or Jasper)
Epidotized Metasomatite
metamorphic
Greenstone Pebbles (Basalt/Diabase)
Metamorphosed Mafic Rock (Greenstone)
metamorphic
Schist
Schist (containing Quartz, Mica, and Amphibole)
metamorphic
Obsidian
Volcanic glass (SiO2 - Silicon Dioxide with impurities)
igneous
Serpentine (Serpentinite)
Hydrous magnesium iron silicate, (Mg,Fe)3Si2O5(OH)4
metamorphic
Chalcedony Pebble (Carnelian / Quartz Pebble)
Silicon Dioxide (SiO2)
mineral
Corundum (Sapphire variant)
Aluminum Oxide (Al2O3)
mineral
Banded Agate (Onyx variant)
Silicon dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Rose Quartz)
Silicon Dioxide (SiO2)
mineral
Granite
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Porphyry (Flower Stone)
Porphyritic Basalt or Andesite
igneous
Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Quartz (Chert/Quartzite variant)
Silicon Dioxide (SiO2)
mineral