Basalt
Basalt (Mafic volcanic rock)
igneous
Category
Mineral Based Alloy (Anthropogenic)
Browse mineral based alloy (anthropogenic) specimens identified by the Rock Identifier community.
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Basalt
Basalt (Mafic volcanic rock)
igneous
Chert (Flint)
Chert (SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Crushed Limestone
Calcite-rich Sedimentary Rock (CaCO3)
sedimentary
Crushed Limestone
Calcium Carbonate (CaCO3)
sedimentary
Basalt
Mafic volcanic rock (Basalt)
igneous
Schist
Mica Schist
metamorphic
Glauconitic Sandstone (Greenstone)
Glauconitic Siliciclastic Sandstone (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2
sedimentary
Quartz with Mica Schist (Pegmatite Specimen)
SiO2 (Silicon Dioxide) and Phyllosilicates (Biotite/Muscovite)
Igneous/Metamorphic Hybrid
Marble
Crystalline Limestone (mostly CaCO3 / Calcium Carbonate)
metamorphic
Basalt
Extrusive mafic igneous rock
igneous
Basalt with Feldspar phenocrysts
Aphanitic to Porphyritic Mafic Volcanic Rock
igneous
Coquina
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Chert (and Quartz Gravel)
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Basalt
Basalt (Mafic volcanic rock)
igneous
Basalt (River Rock pebble)
Basalt (a mafic extrusive igneous rock)
igneous
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Basalt (Porphyritic)
Porphyritic Mafic Extrusive (Basalt)
igneous
Coquina / Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate - CaCO3)
sedimentary
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Diorite
Diorite (intermediate intrusive igneous rock)
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Gabbro
Gabbro
igneous
Basalt
Basalt (Extrusive Mafic Igneous)
igneous
Basalt
Basalt (Extrusive Igneous Rock)
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Basalt (Water-worn Pebble)
Basalt (Mafic volcanic rock)
Igneous
Basalt with Quartz Veining
Basalt (Mafic Volcanic Rock with SiO2)
igneous
Crushed Limestone (Gravel)
Calcium Carbonate (CaCO3)
sedimentary
Basalt
Basalt (Mafic Extrusive Rock)
igneous
Vesicular Basalt
Extrusive mafic igneous rock (primarily Plagioclase feldspar and Pyroxene)
igneous
Granite
Phaneritic intrusive igneous rock (consisting mainly of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Granite Pebble
Granite
igneous
Chert (specifically Gray/Tan Chert Node)
Microcrystalline Quartz (SiO2)
sedimentary
Basalt Pebble
Basalt
igneous
Basalt
Basalt (Mafic igneous rock)
igneous
Vesicular Basalt (River Pebble)
Basalt (Mafic volcanic rock)
igneous
Quartzite Pebble (River Rock)
Metamorphic Quartzite (predominantly SiO2)
metamorphic