Obsidian
Obsidian (volcanic glass, amorphous silica rich rock)
Igneous
Category
Man Made Metamorphic Style Composite
Browse man made metamorphic style composite specimens identified by the Rock Identifier community.
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Rose Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Rhyolite
Rhyolite (High-silica volcanic rock)
igneous
Iron Meteorite (Candidate)
Iron Meteorite (Siderite)
mineral
Red Sandstone
Arenite (primarily Quartz with Hematite cement)
sedimentary
Sandstone (Pebble)
Sandstone (SiO2 dominated clastic sedimentary rock)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Granite Cobble
Granite
igneous
Sandstone
Arenite (primarily Quartz-based Sandstone)
sedimentary
Sandstone
Arenite (Siliclastic sedimentary rock)
sedimentary
Sandstone (with Feldspathic/Arkose qualities)
Arenite (primarily SiO2 with KAlSi3O8 components)
sedimentary
Red Sandstone
Arenite (primarily Quartz with Iron Oxide coating)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (Quartz-rich)
Arenite (Quartz Arenite)
sedimentary
Basalt
Extrusive mafic igneous rock; primarily (Ca,Na)(Mg,Fe,Al,Si)2O6 with (Ca,Na)(Al,Si)4O8
igneous
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Rhodonite
Manganese Silicate (MnSiO₃)
mineral
White Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Serpentine
Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Agate
Silicon dioxide (Chalcedony), SiO2
gemstone
Pink Quartz
Silicon Dioxide (SiO2)
mineral
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Diamond
Native Carbon (C)
mineral
Red Sandstone
Arenite (primarily Quartz with Hematite cement)
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Pink Quartz
Silicon Dioxide (SiO2)
mineral
Tumbled quartz pebble
Quartz (silicon dioxide, SiO₂), likely milky or smoky quartz
mineral
Rhodonite
Manganese Silicate (Mn, Fe, Mg, Ca)SiO3
mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Rhodonite
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Pyrope Garnet
Magnesium aluminum silicate (Mg3Al2Si3O12)
mineral
Rhodonite
Rhodonite (Manganese Iron Magnesium Calcium Silicate) - (Mn+2,Fe+2,Mg,Ca)SiO3
mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Rhodonite
Rhodonite (Manganese Iron Magnesium Calcium Silicate)
mineral
Quartz Vein Rock
Silicon Dioxide (SiO2)
mineral
Pink Quartz / Rose Quartz
Silicon Dioxide (SiO2)
mineral
Serpentinite
Serpentine group minerals ((Mg, Fe)3Si2O5(OH)4)
metamorphic
Red Sandstone
Arenite (with Iron Oxide)
sedimentary