Diamond (Cut Specimen)
Diamond (pure carbon, C)
mineral
Category
Organic Materia (Not A Rock Or Mineral)
Browse organic materia (not a rock or mineral) specimens identified by the Rock Identifier community.
Learn about Organic Materia (Not A Rock Or Mineral) in the encyclopedia
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Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide cement)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Chalcedony/Agate Pebble)
Cryptocrystalline Silica (SiO2)
sedimentary
Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Quartz with Mica/Schist inclusion
Silicon Dioxide (SiO2) with Phyllosilicates
mineral
Amber
Succinited (fossilized tree resin)
fossil
Granite
Phaneritic Felsic Igneous Rock
igneous
Granite
Felsic Plutonic Igneous Rock
igneous
Landscape Boulder / River Rock
Granitic or Quartzite Rock
igneous
Schist
Mica Schist
metamorphic
Granite Sand (Decomposed Granite)
Grus / Quartz-Feldspar Detritus
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Leopard Jasper
Microcrystalline Quartz (SiO2) with mineral inclusions
sedimentary
Jasper and Chalcedony Nodule
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Desert Rose (Gypsum / Barite Rose)
Hydrated Calcium Sulfate (CaSO4·2H2O) / Barium Sulfate (BaSO4)
mineral
Dendritic Jasper
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
sedimentary
Granite
Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)
igneous
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Emerald in Matrix
Beryl (Be3Al2Si6O18)
mineral
Tumbled Agate
Silicon Dioxide (Chalcedony variety), SiO2
mineral
River Rock
Siliciclastic rock (water-worn pebble)
sedimentary
Diorite
Diorite
igneous
Obsidian
Volcanic Glass (Amorphous silicon dioxide with impurities)
igneous
Quartz on Basalt
Silicon Dioxide (SiO2) on Mafic Igneous Rock
Mineral on Igneous Rock
Lapis Lazuli
Lapis Lazuli (Rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)
metamorphic
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone
Arenite
sedimentary
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Common Opal in Host Rock
Hydrated Silica (SiO2·nH2O)
mineraloid
Basalt Breccia
Volcanic Breccia (composed of basaltic clasts in a fine-grained matrix)
igneous
Petrified Wood
Silicified wood (Quartz replacement)
fossil
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Sandstone
Sedimentary Clastic Rock
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary