Basalt
Mafic Igneous Rock
igneous
Category
Synthetic (Not A Natural Rock)
Browse synthetic (not a natural rock) specimens identified by the Rock Identifier community.
Sandstone (likely Siltstone or fine-grained Sandstone)
Sedimentary Rock (Clastic)
sedimentary
Yellow Quartz (Citrine/Yellow Jasper mix)
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Agate (Polished Nodule)
Agate (Silicon Dioxide, SiO2)
mineral
Granite
Phaneritic Igneous Rock (Granite)
igneous
Pink Granite
Granite (Phaneritic intrusive rock)
igneous
Pink Dyed Agate
Chalcedony (SiO2) with artificial dyes
mineral
Citrine Geode Fragment
Citrine (Silicon Dioxide with Iron Impurities), SiO2
mineral
Herkimer Diamond
Quartz (Silicon Dioxide, SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Turquoise
Turquoise (Hydrated phosphate of copper and aluminium), CuAl6(PO4)4(OH)8·4H2O
mineral
Sandstone
Sandstone (lithified quartz arenite, arkose, graywacke, etc. depending on composition)
Sedimentary Rock
Blue Lace Agate (Heat-treated/Crackle Quartz variety)
Silicon Dioxide (SiO2)
mineral
Man-made Blank Ammunition (Brass)
CuZn (Cartridge Brass - roughly 70% Copper, 30% Zinc)
Anticrystalline / Synthetic Alloy
Citrine
SiO2 (Silicon Dioxide)
Mineral
Sandstone
Sandstone (lithified sand)
sedimentary
Sandstone
Clastic Sedimentary Rock (composed mostly of quartz, SiO2)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Green Aventurine
Aventurine Quartz (SiO2 with inclusions)
metamorphic
Turquoise
Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O
Mineral
Granite
Granite (Felsic Plutonic Rock)
igneous
Granite (Leucogranite)
Felsic Plutonic Rock (Granite)
igneous
Granite
Granite (Silicic Plutonic Rock)
igneous
Granite
Phaneritic intrusive felsic igneous rock
igneous
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Limestone (Porous/Travertine variant)
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Arenite (SiO2 based clastic rock)
sedimentary
Chevron Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Rough Sapphire (Corundum)
Corundum (Al2O3)
mineral
Asphalt (Bituminous Concrete)
Bituminous Concrete / Pavement
man-made (synthetic rock)
Pumice
Pumice (a highly vesicular extrusive igneous rock)
igneous
Blue Howlite (Dyed)
Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)
mineral
Sandstone
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Granite
Phaneritic Felsic Igneous Rock
igneous
Granite
Granite (Felsic Plutonic Rock)
Igneous
Green Glass Cullet / Recycled Glass
Amorphous Silicon Dioxide (SiO2) with various metal oxides
Man-made Glass (Not a natural rock or mineral)
Chakra Stone (Composite / Man-made Bonded Gemstones)
Composite of Quartz, Lapis Lazuli, Aventurine, Tiger's Eye, and Jasper (SiO2, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, etc.)
Combined Minerals / Metaphysical stones
Jasper and Yellow Chert (Tumbled)
Microcrystalline Quartz (SiO2)
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Pink Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Emerald In Matrix
Beryl (Be3Al2Si6O18) with trace Chromium/Vanadium
mineral