Rock Identifier

Category

Mineraloid (Man Made Glass)

Browse mineraloid (man made glass) specimens identified by the Rock Identifier community.

Learn about Mineraloid (Man Made Glass) in the encyclopedia

Opalite

Goldstone

Shungite

Blue Goldstone

Sideromelane

Black Obsidian

Maskelynite

Obsidian

Tachylite

Map Jasper

Hyalite Opal

Perlite

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

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Quartzite (Quartzite (chiefly SiO2)) — metamorphic

Quartzite

Quartzite (chiefly SiO2)

Possible tektite or iron-rich slag-like natural specimen (Uncertain; possibly natural glass (tektite) or magnetite-rich rock) — mineral

Possible tektite or iron-rich slag-like natural specimen

Uncertain; possibly natural glass (tektite) or magnetite-rich rock

Pumice (Pumice) — igneous

Pumice

Pumice

Pumice (Pumice (Glassy Volcanic Rock)) — igneous

Pumice

Pumice (Glassy Volcanic Rock)

Pumice (Pumice (Volcanic Rock / Glass Froth)) — igneous

Pumice

Pumice (Volcanic Rock / Glass Froth)

Blue Cat's Eye Quartz (Heated/Dyed) (Silicon Dioxide (SiO2) with fibrous inclusions) — mineral

Blue Cat's Eye Quartz (Heated/Dyed)

Silicon Dioxide (SiO2) with fibrous inclusions

Pumice (Pumice (a highly vesicular volcanic glass)) — igneous

Pumice

Pumice (a highly vesicular volcanic glass)

Ferrous Slag (Fused calcium-iron silicates (Industrial Slag)) — Anthropogenic/Industrial byproduct

Ferrous Slag

Fused calcium-iron silicates (Industrial Slag)

Anthropogenic/Industrial byproduct

Snowflake Obsidian (Obsidian with Cristobalite inclusions (SiO2)) — igneous

Snowflake Obsidian

Obsidian with Cristobalite inclusions (SiO2)

Fulgurite (Fulgurite (Lechatelierite)) — metamorphic

Fulgurite

Fulgurite (Lechatelierite)

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

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Polished green aventurine (Quartzite or quartz-rich rock containing fuchsite mica; mainly SiO₂) — mineral

Polished green aventurine

Quartzite or quartz-rich rock containing fuchsite mica; mainly SiO₂

Milky Quartz Pebble with Iron Inclusions (Silicon Dioxide (SiO2)) — mineral

Milky Quartz Pebble with Iron Inclusions

Silicon Dioxide (SiO2)

Rose Quartz (Silicon Dioxide (SiO2) with inclusions of Dumortierite or similar minerals) — mineral

Rose Quartz

Silicon Dioxide (SiO2) with inclusions of Dumortierite or similar minerals

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Fulgurite (Lechatelierite (vitreous silica / silica glass)) — mineral

Fulgurite

Lechatelierite (vitreous silica / silica glass)

Jasper and Agate Beads (Mahogany Obsidian, Dyed Agate, Turquoise/African Turquoise) (Silicon Dioxide (SiO2) mixture with inclusions / Hydrated Copper Aluminum Phosphate) — gemstone

Jasper and Agate Beads (Mahogany Obsidian, Dyed Agate, Turquoise/African Turquoise)

Silicon Dioxide (SiO2) mixture with inclusions / Hydrated Copper Aluminum Phosphate

Snowflake Obsidian (Volcanic glass containing Spherulitic inclusions (SiO2 + impurities)) — igneous

Snowflake Obsidian

Volcanic glass containing Spherulitic inclusions (SiO2 + impurities)

Snowflake Obsidian (Volcanic glass containing Cristobalite (SiO2)) — igneous

Snowflake Obsidian

Volcanic glass containing Cristobalite (SiO2)

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

White Quartz Pebble

Silicon Dioxide (SiO2)

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

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Diamond (or diamond simulant) (C) — gemstone

Diamond (or diamond simulant)

C

Obsidian (Volcanic Glass (predominantly SiO2)) — igneous

Obsidian

Volcanic Glass (predominantly SiO2)

Quartz-rich rock, possibly milky quartz or quartzite (Quartz (SiO₂), potentially quartzite if the grainy texture is rock-wide) — mineral

Quartz-rich rock, possibly milky quartz or quartzite

Quartz (SiO₂), potentially quartzite if the grainy texture is rock-wide

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartzite Pebble (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Metamorphic Quartzite (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Sandstone (Sedimentary Clastic Rock) — sedimentary

Sandstone

Sedimentary Clastic Rock

Sandstone or Weathered Conglomerate (Sedimentary Rock (Quartzose Sandstone / Lithic Arenite)) — sedimentary

Sandstone or Weathered Conglomerate

Sedimentary Rock (Quartzose Sandstone / Lithic Arenite)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

White Quartz Pebble (Quartz (Silicon Dioxide, SiO2)) — mineral

White Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Sandstone (Sedimentary Rock (Quartz Arenite)) — sedimentary

Sandstone

Sedimentary Rock (Quartz Arenite)

Quartz Arenite / Sandstone (Quartz sandstone (SiO2 rich clastic sedimentary rock)) — sedimentary

Quartz Arenite / Sandstone

Quartz sandstone (SiO2 rich clastic sedimentary rock)

Sandstone (Clastic sedimentary rock) — sedimentary

Sandstone

Clastic sedimentary rock

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

White Quartz (Silicon Dioxide (SiO2)) — mineral

White Quartz

Silicon Dioxide (SiO2)