Granite Pebble
Granite (Phaneritic intrusive igneous rock)
igneous
Category
Anthropogenic (Man Made Material Processed By Nature)
Browse anthropogenic (man made material processed by nature) specimens identified by the Rock Identifier community.
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (with possibly iron oxides and other minerals)
Sandstone
Sedimentary rock
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
Mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Granite (weathered)
Felsic Intrusive Igneous Rock (composed of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Rutilated Quartz
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
mineral
Limonitic Sandstone with Inclusion
Limonitic Quartz Sandstone (primarily SiO2 with FeO(OH)·nH2O)
sedimentary
Granite
Granite (phaneritic intrusive igneous rock consisting mainly of quartz, alkali feldspar, and plagioclase)
igneous
Sandstone
Arenite
sedimentary
Granite
Granite (Felsic Plutonic Rock)
igneous
Granite
Granite (composed primarily of Quartz SiO2, Feldspar KAlSi3O8, and Mica K(Mg,Fe)3AlSi3O10(OH)2)
igneous
Pink Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Banded Agate (Botswana Agate)
Silicon Dioxide (SiO2)
mineral
Banded Chert
Chert (a microcrystalline variety of quartz, SiO2 with minor impurities)
Sedimentary
Basalt (Water-worn Pebble)
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Carnelian
Carnelian Chalcedony (SiO2)
mineral
Amber (Cherry or Red variety)
Succinite (with various trace amounts of organic compounds)
Organic Gemstone (not a rock)
Orange Quartz (Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Pink Granite
Granite (Phaneritic Felsic Igneous Rock)
igneous
Granite
Phaneritic plutonic felsic igneous rock
igneous
Granite
Granite (Felsic Plutonic Rock)
igneous
Red Jasper (beads)
Silicon Dioxide (SiO2) with iron inclusions
Sedimentary Rock
Smoky Quartz
Smoky Quartz (SiO ₂)
Mineral
Granite
Granite (composed primarily of Quartz SiO2, Feldspar KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8, and Mica)
Igneous
Granite
Phaneritic Igneous Rock (composed of quartz, alkali feldspar, and plagioclase)
igneous
Granite
Phaneritic Igneous Rock (composed primarily of Quartz SiO2, Alkali Feldspar, and Plagioclase)
igneous
Quartz
Silicon Dioxide (SiO2)
Mineral
Granite
Granite (Mainly Quartz SiO2, K-Feldspar KAlSi3O8, and Plagioclase)
igneous
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (River Cobble)
Clastic sedimentary rock (primarily SiO2 with various lithic fragments)
sedimentary
Quartzite (Iron-stained)
Quartzite (SiO2 with iron oxides)
metamorphic
Grooved Maun Ball (Maul/Hammerstone-like Concretion)
Calcareous/Ferruginous Concretion in Sandstone Matrix
sedimentary
Sapphire
Corundum (Al2O3)
mineral
Banded Agate (Botswana Agate)
Silicon Dioxide (SiO2)
mineral
Granite
Granite (compositional mixture of Quartz, Feldspar, and Mica)
igneous
Granite
Granite (Felsic Plutonic Rock)
igneous
Granite
Phaneritic Intrusive Igneous Rock (composed of Quartz, Feldspar, and Mica)
igneous
Granite (specifically Pink Granite)
Phaneritic Plutonic Rock (High Potassium Feldspar Granite)
igneous
Sandstone (Quartzite-rich)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Quartz (likely Rose Quartz or Milky Quartz based on color)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Granite
Granite (felsic intrusive igneous rock)
igneous