Rock Identifier

Category

Tektite (Natural Glass)

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

Learn about Tektite (Natural Glass) in the encyclopedia

Macusanite

Moldavite

Obsidian

Black Obsidian

Green Obsidian

Blue Obsidian

Midnight Obsidian

Maskelynite

Pink Obsidian

Purple Obsidian

Purple Obsidian

Teal Obsidian

Yellow-Green Obsidian

Yellow-Green Obsidian

Quartz (Gravel Pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (Gravel Pebble)

Silicon Dioxide (SiO2)

Fire Quartz (Hematoid Quartz) (Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)) — mineral

Fire Quartz (Hematoid Quartz)

Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)

Diamond (or Clear Quartz / Cubic Zirconia) (Carbon (C) or Silicon Dioxide (SiO2) / Cubic Zirconia (ZrO2)) — gemstone

Diamond (or Clear Quartz / Cubic Zirconia)

Carbon (C) or Silicon Dioxide (SiO2) / Cubic Zirconia (ZrO2)

Polished carnelian-rich agate (likely polyhedral jasper/chalcedony) (Microcrystalline quartz, SiO₂, with iron-oxide inclusions) — mineral

Polished carnelian-rich agate (likely polyhedral jasper/chalcedony)

Microcrystalline quartz, SiO₂, with iron-oxide inclusions

Quartz (Milky Quartz / Clear Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky Quartz / Clear Quartz)

Silicon Dioxide (SiO2)

Red Jasper with Quartz Veining (Jasper (Silicon Dioxide, SiO2)) — sedimentary

Red Jasper with Quartz Veining

Jasper (Silicon Dioxide, SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Diamond (Carbon (C), Native Element) — mineral

Diamond

Carbon (C), Native Element

Citrine (SiO2 (Silicon Dioxide)) — mineral

Citrine

SiO2 (Silicon Dioxide)

Tumbled milky quartz pebble (Quartz (silicon dioxide, SiO₂), opaque-to-translucent milky variety) — mineral

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂), opaque-to-translucent milky variety

Flint / Chert (Silicon Dioxide (SiO2)) — sedimentary

Flint / Chert

Silicon Dioxide (SiO2)

Quartz with Epidote (Silicon Dioxide (SiO2) with Calcium Aluminum Iron Silicate [Ca2(Al,Fe)3(SiO4)3(OH)]) — metamorphic

Quartz with Epidote

Silicon Dioxide (SiO2) with Calcium Aluminum Iron Silicate [Ca2(Al,Fe)3(SiO4)3(OH)]

Polished crescent-shaped stone pendant (Likely black jade, basalt, or other dark silicate stone; exact identification requires testing) — mineral

Polished crescent-shaped stone pendant

Likely black jade, basalt, or other dark silicate stone; exact identification requires testing

Yellow Chalcedony (Tumbled/Cabochon) (Silicon dioxide (SiO2)) — mineral

Yellow Chalcedony (Tumbled/Cabochon)

Silicon dioxide (SiO2)

Cubic Zirconia (Zirconium dioxide (ZrO2)) — mineral

Cubic Zirconia

Zirconium dioxide (ZrO2)

Silicon Carbide (Carborundum) (Silicon Carbide (SiC) / Moissanite (natural)) — mineral

Silicon Carbide (Carborundum)

Silicon Carbide (SiC) / Moissanite (natural)

Quartz (Yellow/Citrine variety) (Crystalline Silicon Dioxide (SiO2)) — mineral

Quartz (Yellow/Citrine variety)

Crystalline Silicon Dioxide (SiO2)

Tumbled blue stone, likely blue aventurine or dyed quartzite (Quartz (SiO₂), likely with inclusions or artificial dye; exact identification requires testing) — mineral

Tumbled blue stone, likely blue aventurine or dyed quartzite

Quartz (SiO₂), likely with inclusions or artificial dye; exact identification requires testing

Green Aventurine (Quartzite with Fuchsite inclusions (SiO2)) — metamorphic

Green Aventurine

Quartzite with Fuchsite inclusions (SiO2)

Green Aventurine (Quartzite with Fuchsite inclusions (SiO2 with K(Al,Cr)2AlSi3O10(OH)2)) — metamorphic

Green Aventurine

Quartzite with Fuchsite inclusions (SiO2 with K(Al,Cr)2AlSi3O10(OH)2)

Green Aventurine (SiO2 (Silicon Dioxide with inclusions of Fuchsite mica)) — mineral

Green Aventurine

SiO2 (Silicon Dioxide with inclusions of Fuchsite mica)

Green Aventurine (Aventurine (Silicon Dioxide with Fuchsite inclusions - SiO2 + K(Al,Cr)2AlSi3O10(OH)2)) — mineral

Green Aventurine

Aventurine (Silicon Dioxide with Fuchsite inclusions - SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Green Quartz (Aventurine) (Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)) — mineral

Green Quartz (Aventurine)

Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Aventurine (Green) (Silicon Dioxide (Quartz) with inclusions typically of Fuchsite; SiO2) — metamorphic

Aventurine (Green)

Silicon Dioxide (Quartz) with inclusions typically of Fuchsite; SiO2

Green Aventurine (Silicon Dioxide (Quartz) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)) — metamorphic

Green Aventurine

Silicon Dioxide (Quartz) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Blue Slag Glass (Amorphous Silica (Byproduct of smelting)) — Antropogenic (Man-made)

Blue Slag Glass

Amorphous Silica (Byproduct of smelting)

Antropogenic (Man-made)

Clear quartz sphere (Quartz (silicon dioxide, SiO₂), likely rock crystal or low-grade milky quartz) — mineral

Clear quartz sphere

Quartz (silicon dioxide, SiO₂), likely rock crystal or low-grade milky quartz

Slag (Industrial Glass) (Artificial Vitreous Silicate) — mineraloid (anthropogenic)

Slag (Industrial Glass)

Artificial Vitreous Silicate

mineraloid (anthropogenic)

Quartzite Pebble (Quartzite (primarily SiO2)) — metamorphic

Quartzite Pebble

Quartzite (primarily SiO2)

Pumice (Pumice (Felsic vesicular volcanic glass)) — igneous

Pumice

Pumice (Felsic vesicular volcanic glass)

Quartz with Iron Inclusions (Silicon Dioxide (SiO2) with Hematite or Limonite staining) — mineral

Quartz with Iron Inclusions

Silicon Dioxide (SiO2) with Hematite or Limonite staining

Sandstone (Sedimentary rock composed mainly of quartz sand) — sedimentary

Sandstone

Sedimentary rock composed mainly of quartz sand

Yellow Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Sea Glass (Man-made silicate glass) — sedimentary

Sea Glass

Man-made silicate glass

Sandstone (Sedimentary Rock (Quartz Arenite)) — sedimentary

Sandstone

Sedimentary Rock (Quartz Arenite)

Dyed Quartzite (Pink/Magenta) (Silicon Dioxide (SiO2) - Artificially Colored Quartzite) — mineral

Dyed Quartzite (Pink/Magenta)

Silicon Dioxide (SiO2) - Artificially Colored Quartzite

Amethyst (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Costume Jewelry Gemstones (Emerald-imitation and semi-precious beads) (BeCuAl6Si6O18 (Beryl structure), frequently simulated by glass or synthetic spinel) — mineral

Costume Jewelry Gemstones (Emerald-imitation and semi-precious beads)

BeCuAl6Si6O18 (Beryl structure), frequently simulated by glass or synthetic spinel

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

Quartzite River Rock

Quartzite (primarily SiO2)

Quartz (Citrine or Iron-Stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Citrine or Iron-Stained)

Silicon Dioxide (SiO2)