Basalt
Basalt
Category
Browse sedimentary (base), then artificial specimens identified by the Rock Identifier community.
Basalt
Basalt
Basalt
Mafic volcanic rock (Primary minerals: Plagioclase feldspar, Pyroxene)
Basalt with Vesicle/Vug
Basalt (Aphanitic Mafic Igneous Rock)
Basalt
Basalt (Aphanitic-to-porphyritic mafic volcanic rock)
Granite
Phaneritic Felsic Igneous Rock
Basalt (with possible Olivine inclusions)
Mafic Igneous Rock (primarily Plagioclase and Pyroxene)
Andesite
Andesite (Intermediate Extrusive Volcanic Rock)
Red Quartzite (Ferruginous Quartz)
Quartzite (SiO2 with Fe2O3 inclusions)
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
Vesicular Basalt (River Pebble)
Vesicular Basalt
Basalt with Epidote (Porphyry)
Basalt (with inclusions of Epidote/Feldspar)
Granite
Phaneritic Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)
River Rock (Quartzite/Chert conglomerate)
Quartzite (SiO2)
Basalt
Basalt (Mafic volcanic rock)
Basalt (Water-worn pebble)
Basalt (Aphanitic mafic volcanic rock)
Iron Slag
Vitreous glassy waste (Fe-Si-Al-Ca compounds)
Granite
Phaneritic Felsic Igneous Rock
Basalt
Basalt (Aphanitic Mafic Volcanic Rock)
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
Basalt (Vesicular)
Extrusive mafic igneous rock; primarily (Ca, Na)(Mg, Fe, Al)(Si, Al)2O6 with (Ca, Na)(Al, Si)4O8
Quartzite
Quartzite (SiO2)
Schist (Diamond Drill Core)
Mica Schist
Basalt
Basalt (Mafic Extrusive Igneous Rock)
Diorite
Diorite (an intermediate intrusive igneous rock)
Quartzite Pebble
Quartzite (primarily SiO2)
Granite
Phaneritic Felsic Igneous Rock (Granite)
Rhodonite
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
K2 Jasper
Azurite in Granite
Epidote in Basalt
Epidotized Basalt (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH) in Mafic Igneous Host)
K2 Jasper (K2 Granite)
Azurite in Granite (K(Mg,Fe)3AlSi3O10(OH,F)2 + Cu3(CO3)2(OH)2)
Citrine (Quartz variant)
SiO2 (Silicon Dioxide)
Pink Granite (Potassium-rich)
Phaneritic Felsic Igneous Rock (K-Feldspar Granite)
Aragonite (specifically Mexican Marbled Onyx)
Aragonite (Calcium Carbonate, CaCO3)
Rhodonite Tumbled Chips
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
Citrine
Citrine (Silicon Dioxide, SiO2)
Titanium Aura Quartz (Bismuth-coated Druzy)
Silicon Dioxide (SiO2) with Titanium/Metal vapor coating
Orange Quartzite / Carnelian Agate
Silicon Dioxide (SiO2)
Granite Pebble
Granite (composed primarily of Quartz, Feldspar, and Mica)
Bumble Bee Jasper
Volcanic Tuff (mixture of SiO2, CaCo3, S, and As2S3)
Blue Quartzite
Quartzite (silicon dioxide, SiO2)
Green Apophyllite on Stilbite
Fluorapophyllite-(K) [(KCa4Si8O20F)·8H2O] and Stilbite [NaCa4(Si27Al9)O72·28H2O]
Epidote
Epidote (Ca2(Al,Fe)3(SiO4)3(OH))