Rock Identifier

Category

Tektite (Impact Glass)

Browse tektite (impact glass) specimens identified by the Rock Identifier community.

Learn about Tektite (Impact Glass) in the encyclopedia

Moldavite

Maskelynite

Macusanite

Pseudotachylite

Pseudotachylite

Suevite

Quartz Pebble (River Agate / Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble (River Agate / Chalcedony)

Silicon Dioxide (SiO2)

Quartzite River Rock (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite River Rock

Metamorphic Quartzite (SiO2)

Pyrite (Fool's Gold) (Iron Pyrite (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Pyrite (FeS2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Libyan Desert Glass (Natural Silica Glass (SiO2 with minor iron and titanium)) — mineraloid

Libyan Desert Glass

Natural Silica Glass (SiO2 with minor iron and titanium)

Rounded river or beach pebble (Likely quartz-rich sandstone or quartzite; exact identification requires a close-grained view and hardness test) — sedimentary

Rounded river or beach pebble

Likely quartz-rich sandstone or quartzite; exact identification requires a close-grained view and hardness test

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (River Cobble) (Silicon Dioxide (SiO2)) — mineral

Quartz (River Cobble)

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Beach Agate / Chalcedony Pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble (Beach Agate / Chalcedony Pebble)

Silicon Dioxide (SiO2)

Red cabochon gemstone, likely carnelian or dyed chalcedony (Chalcedony (microcrystalline quartz), SiO₂; exact identification requires testing) — gemstone

Red cabochon gemstone, likely carnelian or dyed chalcedony

Chalcedony (microcrystalline quartz), SiO₂; exact identification requires testing

Smoky Quartz with Iron Inclusions (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Quartz Pebble (Sea Glass-like texture) (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble (Sea Glass-like texture)

Silicon Dioxide (SiO2)

Pumice (Vesicular Rhyolite / Pumice) — igneous

Pumice

Vesicular Rhyolite / Pumice

Quartz (Sea Glass or River-worn Pebble style) (Silicon Dioxide (SiO2)) — mineral

Quartz (Sea Glass or River-worn Pebble style)

Silicon Dioxide (SiO2)

Quartzite (River-worn Shiner) (Quartzite (Formula: SiO2)) — metamorphic

Quartzite (River-worn Shiner)

Quartzite (Formula: SiO2)

Amethyst (Water-Worn Pebble) (Silicon Dioxide (SiO2 with iron impurities)) — mineral

Amethyst (Water-Worn Pebble)

Silicon Dioxide (SiO2 with iron impurities)

Polymictic breccia, possibly volcanic breccia (Polymictic clastic breccia; likely a matrix-supported breccia containing lithic fragments, quartz, feldspar, and dark mafic minerals) — sedimentary

Polymictic breccia, possibly volcanic breccia

Polymictic clastic breccia; likely a matrix-supported breccia containing lithic fragments, quartz, feldspar, and dark mafic minerals

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

Carbonado (Black Diamond) (Carbonado (Polycrystalline Diamond)) — mineral

Carbonado (Black Diamond)

Carbonado (Polycrystalline Diamond)

Blue topaz (likely treated) (Topaz, Al₂SiO₄(F,OH)₂) — gemstone

Blue topaz (likely treated)

Topaz, Al₂SiO₄(F,OH)₂

Metallic iron meteorite fragments (probable) (Iron meteorite, chiefly kamacite (α-(Fe,Ni)) with possible taenite) — meteorite

Metallic iron meteorite fragments (probable)

Iron meteorite, chiefly kamacite (α-(Fe,Ni)) with possible taenite

Muscovite (KAl2(AlSi3O10)(OH)2) — mineral

Muscovite

KAl2(AlSi3O10)(OH)2

Quartz (River Pebble) (Quartz (Silicon Dioxide - SiO2)) — mineral

Quartz (River Pebble)

Quartz (Silicon Dioxide - SiO2)

Rhodonite (Rhodonite (MnSiO3)) — Mineral

Rhodonite

Rhodonite (MnSiO3)

Blue Topaz (Al2SiO4(F,OH)2 (Aluminum silicate fluoride hydroxide)) — gemstone

Blue Topaz

Al2SiO4(F,OH)2 (Aluminum silicate fluoride hydroxide)

Rounded gray stone, likely quartz-rich granitic rock (Probable granite or granitic gneiss; mainly quartz, feldspar, and mica) — igneous

Rounded gray stone, likely quartz-rich granitic rock

Probable granite or granitic gneiss; mainly quartz, feldspar, and mica

Heliodor (Yellow Beryl) / Greenish-Yellow Beryl (Beryl (Be3Al2Si6O18)) — mineral

Heliodor (Yellow Beryl) / Greenish-Yellow Beryl

Beryl (Be3Al2Si6O18)

Granite or granitic gneiss (Felsic granitoid, chiefly quartz, feldspar, and mica; possibly weakly foliated gneiss) — igneous

Granite or granitic gneiss

Felsic granitoid, chiefly quartz, feldspar, and mica; possibly weakly foliated gneiss