River Rocks and Pebbles
Mixed Silica-rich Sediments (SiO2 based)
sedimentary
Category
Metamorphic Rock (Specifically A Rock Composed Of Minerals)
Browse metamorphic rock (specifically a rock composed of minerals) specimens identified by the Rock Identifier community.
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Granite
Intrusive Igneous Rock
igneous
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, e.g., Lizardite, Chrysotile, Antigorite)
metamorphic
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)
metamorphic
Granite
Felsic intrusive igneous rock
igneous
Red Sandstone
Arenite (primarily Quartz with Hematite cement)
sedimentary
Lapis Lazuli
Complex rock primarily containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2
metamorphic
Quartzite
Quartzite
metamorphic
Rough Garnet in Matrix
Almandine Garnet (Fe3Al2Si3O12)
mineral
Red Sandstone
Arenite with Iron Oxide (Hematite) cement
sedimentary
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)
metamorphic
Bauxite
Bauxite (Al(OH)3, AlO(OH), AlOOH)
sedimentary
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Schist
Mica Schist
metamorphic
Granite Boulder
Intrusive Igneous Rock
igneous
Serpentine
(Mg,Fe)3Si2O5(OH)4
metamorphic
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Granite
Intrusive Igneous Rock
igneous
Moonstone
Adularia (Potassium Aluminum Silicate, KAlSi3O8)
mineral
Pink Granite
Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Mica)
igneous
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Pink Granite
Granite (composed primarily of Quartz, K-Feldspar, and Plagioclase)
igneous
Dragon Blood Jasper
SiO2
mineral
Dalmation Stone (often called Dalmatian Jasper)
Antiperthite-rich Microgranite
igneous
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (SiO2 dominated)
sedimentary
Seashell (Calcium Carbonate)
Calcium Carbonate (CaCO3)
mineral
Nuummite
Nuummite (ortho-amphibole rock)
metamorphic
Serpentinite
Serpentinite (composed largely of serpentine group minerals including antigorite, lizardite, and chrysotile)
metamorphic
Granite Pebble
Granite (Plutonic Igneous Rock)
igneous
Slate
Foliated Metamorphic Rock (Mainly composed of Quartz, Illite, Chlorite)
metamorphic
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Banded Agate
Chalcedony / Silicon Dioxide (SiO2)
mineral
Quartzite (River Pebble)
Meta-quartzite (composed primarily of SiO2)
metamorphic
Red Sandstone
Clastic sedimentary rock (primarily Quartz with Hematite)
sedimentary
Amygdaloidal Basalt with Epidote/Chlorite
Basalt (containing (Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH)))
igneous
Jasper (Yellow Jasper)
Silicon Dioxide (SiO2) with iron inclusions
sedimentary
Quartz Vein in Metamorphic Rock
Quartz-veined Schist or Gneiss
metamorphic
Bumblebee Jasper
Fossiliferous Volcanic Rock (composed of Calcium Carbonate, Manganese Oxides, and Arsenic Sulfides)
igneous
Bauxite
Bauxite (Al2O3·nH2O)
sedimentary
Gneiss
Gneiss (Metamorphic rock composed primarily of quartz, feldspar, and mica)
metamorphic
Graphic Granite (or Rapakivi-textured Granite)
Alkali feldspar granite
igneous
Snowflake Obsidian
Obsidian with Cristobalite inclusions
igneous