Pumice
Pumicite
igneous
Category
Not A Rock
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Vesicular Basalt
Vesicular Basalt (Aphanitic-Vesicular Mafic Rock)
igneous
Unakite
Epidotized Granite (SiO2 with Ca2(Al, Fe)3(SiO4)3(OH))
metamorphic
Pink Granite
Phaneritic Acidic Igneous Rock (Rich in K-feldspar)
igneous
Exposed Aggregate Concrete (Pea Gravel)
Concrete with Siliceous Alluvial Gravels
sedimentary (man-made conglomerate)
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Ferruginous Sandstone
Arenite with Iron-oxide cement
sedimentary
Pink Granite
Phaneritic Granitoid (K-Feldspar rich)
igneous
Basalt (Beach Pebble)
Basalt
igneous
Dalmatian Stone (Dalmatian Jasper)
Peralkaline Quartz-Feldspar Porphyry with Arfvedsonite
igneous
Basalt
Basalt
igneous
Basalt
Basalt (Vitreous to Fine-grained Extrusive Igneous Rock)
igneous
Limestone with Secondary Mineralization
Calcium Carbonate (CaCO3)
sedimentary
Glauconite (Green Sandstone)
Glauconite (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2
sedimentary
Unakite
Epidotized Granite
metamorphic
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Granite
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Vesicular Basalt
Extrusive mafic igneous rock (Basalt)
igneous
Basalt with Olivine Phenocrysts
Aphanitic Mafic Volcanic Rock (Basalt)
igneous
Basalt Beach Pebble
Basalt (Aphanitic Mafic Volcanic Rock)
igneous
River Stone (likely Basalt or fine-grained Andesite)
Extrusive Igneous Rock (Mafic to Intermediate)
igneous
Basalt River Stone
Basalt (Aphanitic Mafic Volcanic Rock)
igneous
Basalt River Pebble
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Basalt (Beach Pebble)
Basalt (Aphanitic Mafic Igneous Rock)
Igneous
Basalt (potential Glacial Erratic)
Extrusive Mafic Volcanic Rock (Basalt)
igneous
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Basalt River Stone
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Basalt River Pebble
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Dalmation Stone
Peralkaline Rock (mixed silicate minerals)
igneous
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Basalt (Weathered)
Extrusive Igneous Rock (Mafic composition)
igneous
Vesicular Basalt
Aphanitic Mafic Igneous Rock (with vesicles)
igneous
Basalt River Stone
Basalt (Aphanitic Mafic Igneous Rock)
igneous
River Stone (Basalt or fine-grained Schist)
Mafic Igneous Rock / Volcanic Basalt
igneous
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Basalt Beach Pebble
Basalt (Aphanitic Mafic Igneous Rock)
igneous
River Stone (Basalt)
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Pink Granite
Granite (Phaneritic igneous rock)
igneous
Vesicular Basalt
Basalt (Extrusive Igneous Rock)
igneous
Basalt (Beach Pebble)
Extrusive mafic igneous rock
igneous
Black River Stone (likely Basalt or Chert)
Basalt (primarily Plagioclase Feldspar and Pyroxene)
igneous
Rose Quartz
Silicon Dioxide (SiO2) with Trace Inclusions
mineral