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

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

Green Aventurine

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

Green Aventurine (Silicon Dioxide (Quartz with Fuchsite inclusions) - SiO2) — mineral

Green Aventurine

Silicon Dioxide (Quartz with Fuchsite inclusions) - SiO2

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

Aventurine (Green Quartz)

Silicon Dioxide (SiO2) with Fuchsite inclusions

Green Aventurine (Tumbled Quartzite) (Silicon Dioxide (SiO2) with inclusions of Fuchsite) — metamorphic

Green Aventurine (Tumbled Quartzite)

Silicon Dioxide (SiO2) with inclusions of Fuchsite

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

Green Aventurine

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

Green Aventurine (Aventurine Quartz (SiO2 with inclusions)) — metamorphic

Green Aventurine

Aventurine Quartz (SiO2 with inclusions)

Green Aventurine (Aventurine Quartz (SiO2 with Fuchsite inclusions)) — mineral

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

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

Green Aventurine

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

Green Aventurine (Silicon dioxide (SiO2) with inclusions of Fuchsite) — metamorphic

Green Aventurine

Silicon dioxide (SiO2) with inclusions of Fuchsite

Red aventurine (Silicon Dioxide (SiO2) with Hematite/Goethite inclusions) — metamorphic

Red aventurine

Silicon Dioxide (SiO2) with Hematite/Goethite inclusions

Yellow Quartz (SiO2) — mineral

Yellow Quartz

SiO2

Dyed Tumbled Quartz (Silicon Dioxide (SiO2) with artificial pigment) — mineral

Dyed Tumbled Quartz

Silicon Dioxide (SiO2) with artificial pigment

Pink chalcedony / quartz fragment (probable) (Microcrystalline quartz, SiO₂ (likely iron-stained chalcedony or quartzite)) — mineral

Pink chalcedony / quartz fragment (probable)

Microcrystalline quartz, SiO₂ (likely iron-stained chalcedony or quartzite)

Clear Quartz Sphere (Crystalline Silicon Dioxide (SiO2)) — mineral

Clear Quartz Sphere

Crystalline Silicon Dioxide (SiO2)

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)

Green Slag Glass (Amorphous Silica / Glassy Blast Furnace Slag) — Mineraloid (Industrial byproduct)

Green Slag Glass

Amorphous Silica / Glassy Blast Furnace Slag

Mineraloid (Industrial byproduct)

Diamond (or Diamond Simulant) (Carbon (C) or Zirconium dioxide (ZrO2) for CZ) — gemstone

Diamond (or Diamond Simulant)

Carbon (C) or Zirconium dioxide (ZrO2) for CZ

Cherry Quartz with Rose Quartz (Crystalline Quartz (SiO2) with glass-based synthetic components) — gemstone

Cherry Quartz with Rose Quartz

Crystalline Quartz (SiO2) with glass-based synthetic components

Sandstone (Quartzite-rich Cobble) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (Quartzite-rich Cobble)

Clastic sedimentary rock (primarily SiO2)

Sandstone (Sedimentary Rock (Quartz arenite)) — sedimentary

Sandstone

Sedimentary Rock (Quartz arenite)

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Sandstone (Sedimentary rock composed mainly of sand-sized minerals or rock grains) — sedimentary

Sandstone

Sedimentary rock composed mainly of sand-sized minerals or rock grains

Sandstone (Arenite (specifically Iron-stained Quartz Sandstone)) — sedimentary

Sandstone

Arenite (specifically Iron-stained Quartz Sandstone)

$Faceted clear gemstone, likely quartz or glass imitation (Most likely quartz (SiO₂); exact identification requires refractive-index and hardness tests) — gemstone$

Faceted clear gemstone, likely quartz or glass imitation

Most likely quartz (SiO₂); exact identification requires refractive-index and hardness tests

Chert (specifically Flint or Jasper variant) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (specifically Flint or Jasper variant)

Microcrystalline quartz (SiO2)

Sandstone (Arenite (primarily Quartz, SiO2)) — sedimentary

Sandstone

Arenite (primarily Quartz, SiO2)

Sandstone (Water-worn Cobble) (Arenite (SiO2 with CaCO3 or Fe2O3 cement)) — sedimentary

Sandstone (Water-worn Cobble)

Arenite (SiO2 with CaCO3 or Fe2O3 cement)

Tumbled smoky quartz (probable) (Quartz, silicon dioxide (SiO₂), colored by irradiation and trace aluminum) — mineral

Tumbled smoky quartz (probable)

Quartz, silicon dioxide (SiO₂), colored by irradiation and trace aluminum

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

Green Aventurine (Quartz)

SiO2 (Silicon Dioxide with Fuchsite inclusions)

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)

Milky quartz (rough quartz fragment) (Quartz, silicon dioxide (SiO₂)) — mineral

Milky quartz (rough quartz fragment)

Quartz, silicon dioxide (SiO₂)

Quartzite with Iron inclusions (Quartzite (SiO2 with Fe2O3 trace impurities)) — metamorphic

Quartzite with Iron inclusions

Quartzite (SiO2 with Fe2O3 trace impurities)

Chert with Chalcedony/Quartz Vug (Cryptocrystalline Silica (SiO2)) — sedimentary

Chert with Chalcedony/Quartz Vug

Cryptocrystalline Silica (SiO2)

Citrine Quartz (Silicon Dioxide (SiO₂) with iron impurities) — mineral

Citrine Quartz

Silicon Dioxide (SiO₂) with iron impurities

Clear Quartz Crystal (Silicon Dioxide (SiO2)) — mineral

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Tumbled black stone, likely black obsidian (Obsidian — natural volcanic glass, predominantly silica-rich rhyolitic composition) — igneous

Tumbled black stone, likely black obsidian

Obsidian — natural volcanic glass, predominantly silica-rich rhyolitic composition

Heat-Treated Amethyst (Commercial Citrine) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Heat-Treated Amethyst (Commercial Citrine)

Silicon Dioxide (SiO2) with iron impurities

Yellow Quartz (SiO2 (Crystalline Silicon Dioxide)) — mineral

Yellow Quartz

SiO2 (Crystalline Silicon Dioxide)

Yellow Jasper (Silicon Dioxide (SiO2) with iron hydroxides) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides

Chert (Green Fossilized Algae or Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Green Fossilized Algae or Jasper)

Silicon Dioxide (SiO2)

Quartzite Pebble (Metamorphic Quartz-rich Rock) — metamorphic

Quartzite Pebble

Metamorphic Quartz-rich Rock

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

Yellow Quartz (Citrine/Iron-Stained Quartz)

Silicon Dioxide (SiO2)