Vesicular Basalt
Basalt with vesicular texture
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
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Chert (with small quartz inclusion)
Microcrystalline Silica (SiO2)
sedimentary
Basalt River Pebble
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Chert (variations include Flint/Jasper)
Chert (SiO2)
sedimentary
Basalt
Mafic Igneous Rock
igneous
Granite
Phaneritic plutonic felsic rock (Quartz, Feldspar, Mica)
igneous
Pink Granite
Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Mica)
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Diorite (Polished Tumble)
Diorite (Intermediate intrusive igneous rock)
Igneous
Basalt
Basalt (primarily Plagioclase feldspar and Pyroxene)
igneous
Quartzite
Quartzite (SiO2)
metamorphic
Basalt
Basalt (composition mainly of Plagioclase feldspar, Pyroxene, and Olivine)
igneous
Basalt
Basalt (containing plagioclase, pyroxene, and olivine)
igneous
Basalt
Basalt (extrusive volcanic rock)
igneous
Pink Granite
Phaneritic Felsic Igneous Rock (Rich in K-Feldspar)
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Andesite
Andesite (Intermediate Volcanic Rock)
igneous
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Basalt (with possible weathered crust)
Basalt (composition: Plagioclase feldspar, Pyroxene, Olivine)
igneous
Basalt
Extrusive mafic igneous rock
igneous
Limestone (with potential fossil inclusions)
Calcium Carbonate (CaCO3)
sedimentary
Grey Basalt Pebble
Basalt (Aphanitic Mafic Volcanic Rock)
igneous
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Andesite
Andesite (Intermediate Extrusive Volcanic Rock)
igneous
Chert (Basanite variety)
Microcrystalline Quartz (SiO2)
sedimentary
Basalt (River Stone)
Extrusive Mafic Igneous Rock (Basalt)
igneous
Chert Nodule (River Cobble)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Dacite
Dacite (intermediate volcanic rock)
igneous
Quartzite Cobble
Meta-quartzite (SiO2)
metamorphic
Basalt (Porphyritic)
Porphyritic Basalt
igneous
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Crushed Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Granite
Granite (Phaneritic igneous rock)
igneous
Chert (often called Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Coquina
Bioclastic Limestone
sedimentary
Basalt
Basalt (Mafic volcanic rock)
igneous
Basalt
Basalt (Mafic Extrusive)
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous