Basalt River Cobble
Basalt (Mafic Extrusive Igneous Rock)
igneous
Category
Organic (Paper And Cellulose)
Browse organic (paper and cellulose) specimens identified by the Rock Identifier community.
Basalt
Mafic Igneous Rock
igneous
Basalt (River Pebble)
Extrusive mafic igneous rock
igneous
Diamond (in Jewelry Setting)
Carbon (C) - Isometric-Hexoctahedral
mineral
Basalt (tumbled/river-worn)
Mafic volcanic rock (primarily plagioclase feldspar and pyroxene)
igneous
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Vesicular Basalt
Extrusive Basalt (Mafic Silicate)
igneous
Basalt (Vesicular/Amygdaloidal or Water-Worn)
Basalt
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Basalt
Basalt (Mafic igneous rock)
igneous
Basalt (with possible Olivine inclusions)
Mafic Igneous Rock (primarily Plagioclase and Pyroxene)
igneous
Gold Nugget / Flake
Native Gold (Au)
mineral
Basalt (Crushed Stone)
Basalt (Mafic Extrusive Igneous Rock)
igneous
Basalt
Extrusive mafic igneous rock
igneous
Basalt
Basalt
igneous
Basalt Pebble
Extrusive Mafic Igneous Rock
igneous
Basalt
Mafic Igneous Rock (composed primarily of plagioclase, pyroxene, and olivine)
igneous
Vesicular Basalt (Scoria)
Basalt (Vesicular)
igneous
River Quartz / Quartzite Pebbles
Quartzite (primarily Silicon Dioxide, SiO2)
metamorphic
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (SiO2 major component)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Milky Quartz with Mica inclusions
Quartz (Silicon Dioxide, SiO2)
mineral
Note: No specimen visible
N/A
River Pebble (Quartzite/Siltstone mixture)
Silicon Dioxide (SiO2) mixture with varied clastic minerals
sedimentary/metamorphic
Red Moss Agate or Jasper-Agate
Silicon Dioxide (SiO2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Serpentinite
Serpentinite ((Mg,Fe,Ni,Al)3Si2O5(OH)4)
metamorphic
Conch Pearl
Calcareous concretion (CaCO3)
mineraloid
Biotite (Mica)
K(Mg,Fe)3AlSi3O10(OH,F)2
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Drusy/Crystalline)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (likely Ferruginous)
Arenite (SiO2 based with Fe2O3/FeO(OH) cement)
sedimentary
Orange Quartzite / Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Orange Calcite point
Calcite (Calcium Carbonate, CaCO3)
mineral
Ferruginous Sandstone (Ironstone Conglomerate fragments)
Ferruginous clastic sedimentary rock (SiO2 cemented by Fe2O3)
sedimentary
Orange Calcite (Banded Calcite)
Calcite (Calcium Carbonate, CaCO3)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Quartz (Milky/Iron-stained)
Silicon Dioxide (SiO2)
mineral