Blue Quartzite
Quartzite (specifically a variety enriched with blue-coloring minerals)
Metamorphic Rock
Category
Mineral (Impactite)
Browse mineral (impactite) specimens identified by the Rock Identifier community.
Granite
Granite (a plutonic igneous rock composed of quartz, feldspar, and mica)
igneous
Dinosaur Bone (Fossilized)
Permineralized Bone (CaCO3 or SiO2 after Hydroxylapatite)
sedimentary
Labradorite
Labradorite (a calcium-enriched feldspar mineral), (Ca, Na)(Al, Si)4O8
mineral
Red Garnet
Almandine and Pyrope (Silicate minerals: Fe3Al2(SiO4)3 and Mg3Al2(SiO4)3)
mineral
Nephrite (a form of Jade)
Nephrite (a variety of the mineral actinolite, Ca2(Mg,Fe)5Si8O22(OH)2)
Mineral
Limonite-pseudomorph after Pyrite (Prophecy Stone)
Goethite and Limonite secondary minerals (FeO(OH)·nH2O) replacing Pyrite (FeS2)
mineral
Quartz with Hematite Staining
Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3) inclusions
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Diamond
Carbon (C)
mineral
Diamond
Diamond (C)
mineral
Green Aventurine
Aventurine (variety of Quartz - SiO2)
Mineral_Rock
Granite
Phaneritic Felsic Igneous Rock (Main minerals: SiO2, KAlSi3O8, NaAlSi3O8)
igneous
Schist
Crystalline Metamorphic Rock (Schistose)
metamorphic
Basalt (with possible mineral veining)
Basalt (Aphanitic Mafic Igneous Rock)
Igneous
Quartzite with Iron Mineral Banding
Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3) staining
metamorphic
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
sedimentary
Basalt with Quartz/Feldspar Vein
Amygdaloidal Basalt with Plutonic intrusion (SiO2/KAlSi3O8)
igneous
Ferruginous Sandstone
Sandstone (rich in iron oxides/hydroxides)
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Granite Cobble
Granite
igneous
Green Aventurine
Quartz with Fuchsine inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
mineral
Geode (Unopened)
Silica Concretion / Geode (Formula: SiO2 for quartz internal contents)
sedimentary
Chrysocolla
Chrysocolla, (Cu, Al)2H2Si2O5(OH)4·nH2O
mineral
Granite
Granite (Felsic intrusive igneous rock)
igneous
Copper-bearing Quartz (likely Malachite on Quartz matrix)
Cu2CO3(OH)2 (Malachite) on SiO2 (Quartz)
mineral
Greenstone
Metabasalt / Greenschist facies rock
metamorphic
Gneiss
Gneiss
metamorphic
River Stone (Granitic Gneiss)
Foliated Granitic Gneiss
metamorphic
Charoite
Charoite (Hydrated potassium, sodium, calcium, barium, strontium silicate hydroxide fluoride)
metamorphic
Granite Pebble
Granite (Phaneritic intrusive igneous rock)
igneous
Granite (Pink/Red)
Phaneritic Plutonic Felsic Rock (major minerals: Quartz, Orthoclase Feldspar, Plagioclase Feldspar)
igneous
Granite
Plutonic felsic rock (Quartz, Feldspar, Mica)
igneous
Gneiss (Granitic Gneiss)
Gneiss (composed primarily of Quartz, Feldspar, and Mica/Amphibole)
metamorphic
Diorite (River Rock)
Intermediate plutonic igneous rock
igneous
Quartz Pebble (with probable inclusions or staining)
Quartz (Silicon Dioxide - SiO2)
mineral
Granite (with Orthoclase and Quartz)
Phaneritic Felsic Igneous Rock (KAlSi3O8 + SiO2)
igneous
Sandstone (Greywacke)
Arenite / Clastic Sedimentary Rock
sedimentary
Diamond (Macled/Crystal fragment)
Carbon (C), isometric crystal system
mineral
Granite featuring Quartz Vein
Granite with hydrothermal silica (SiO2) intrusion
igneous
Granite
Granite (Phaneritic igneous rock)
igneous
Basalt
Aphanitic mafic volcanic rock (primarily plagioclase feldspar and pyroxene)
igneous