Rock Identifier

Category

Mineral (Man Made Glass, Not Natural)

Browse mineral (man made glass, not natural) specimens identified by the Rock Identifier community.

Learn about Mineral (Man Made Glass, Not Natural) in the encyclopedia

Opalite

Goldstone

Obsidian

Black Obsidian

Macusanite

Baddeleyite

Blue Goldstone

Green Obsidian

Blue Obsidian

Midnight Obsidian

Maskelynite

Pink Obsidian

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

Amethyst

SiO2 (Silicon Dioxide with Iron impurities)

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

Amethyst

Silicon Dioxide with iron impurities (SiO2)

Tumbled quartz pebble (Quartz (SiO₂), likely milky or iron-stained quartz) — mineral

Tumbled quartz pebble

Quartz (SiO₂), likely milky or iron-stained quartz

Quartz (Smoky/Druzy variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky/Druzy variety)

Silicon Dioxide (SiO2)

Fluorite Octahedron (Calcium Fluoride (CaF2)) — mineral

Fluorite Octahedron

Calcium Fluoride (CaF2)

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

Terrazzo flooring containing marble aggregate (Marble (recrystallized calcite, CaCO₃) aggregate in cementitious terrazzo) — metamorphic

Terrazzo flooring containing marble aggregate

Marble (recrystallized calcite, CaCO₃) aggregate in cementitious terrazzo

Dyed Blue Quartzite (SiO2 (Silicon Dioxide) with artificial colorants) — metamorphic

Dyed Blue Quartzite

SiO2 (Silicon Dioxide) with artificial colorants

Black Spinel (Magnesium Aluminum Oxide (MgAl2O4)) — mineral

Black Spinel

Magnesium Aluminum Oxide (MgAl2O4)

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

Green Aventurine

Quartz (SiO2) with Fuchsite inclusions

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

White Quartz Pebble

Silicon Dioxide (SiO2) - Quartz

Sandstone (Ferruginous) (Arenite with Iron-Oxide Cement) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron-Oxide Cement

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Citrine Quartz (Crystalline Silicon Dioxide (SiO2) with Ferric Iron impurities) — mineral

Citrine Quartz

Crystalline Silicon Dioxide (SiO2) with Ferric Iron impurities

Mahogany Obsidian (Obsidian (Volcanic Glass) with Hematite or Magnetite inclusions, SiO2 (Silicon Dioxide)) — igneous

Mahogany Obsidian

Obsidian (Volcanic Glass) with Hematite or Magnetite inclusions, SiO2 (Silicon Dioxide)

Prasiolite (Green Quartz) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Prasiolite (Green Quartz)

Silicon Dioxide (SiO2) with iron impurities

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

Chert (Flint/Chalcedony)

Silicon Dioxide (SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Tumbled blue chalcedony (likely common blue quartz) (Microcrystalline quartz, SiO₂; chalcedony variety) — mineral

Tumbled blue chalcedony (likely common blue quartz)

Microcrystalline quartz, SiO₂; chalcedony variety

Red Sandstone (Arenite (SiO2 with Iron Oxide impurities)) — sedimentary

Red Sandstone

Arenite (SiO2 with Iron Oxide impurities)

Diamond (in jewelry) (Element Carbon (C)) — mineral

Diamond (in jewelry)

Element Carbon (C)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Pink agate (likely dyed or coated) (Microcrystalline quartz, SiO₂ (chalcedony/agate)) — mineral

Pink agate (likely dyed or coated)

Microcrystalline quartz, SiO₂ (chalcedony/agate)

Chalcedony (Agate / Jasper Pebble) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agate / Jasper Pebble)

Silicon Dioxide (SiO2)

Obsidian (Volcanic Glass) — igneous

Obsidian

Volcanic Glass

Shale (Shale (claystone/mudstone)) — sedimentary

Shale

Shale (claystone/mudstone)

Rough Sapphire (Corundum (Al2O3)) — mineral

Rough Sapphire

Corundum (Al2O3)

Blue Agate (Dyed) (Silicon Dioxide (SiO2)) — Sedimentary (formed from silica deposits)

Blue Agate (Dyed)

Silicon Dioxide (SiO2)

Sedimentary (formed from silica deposits)

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

Amethyst

Amethyst (Silicon Dioxide with iron impurities), SiO2

Mixed rock and mineral collection (Mixed lithologies; likely quartz, feldspar, basalt, granite, chert, sandstone, and metamorphic rocks) — igneous, sedimentary, metamorphic, mineral

Mixed rock and mineral collection

Mixed lithologies; likely quartz, feldspar, basalt, granite, chert, sandstone, and metamorphic rocks

igneous, sedimentary, metamorphic, mineral

Chert (often called Flint or Jasper if reddish) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint or Jasper if reddish)

Microcrystalline Quartz (SiO2)

Amethyst and Green Aventurine (Tumbled Gemstones set in a wand) (Quartz (SiO2) varieties - Amethyst and Aventurine) — gemstone

Amethyst and Green Aventurine (Tumbled Gemstones set in a wand)

Quartz (SiO2) varieties - Amethyst and Aventurine

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Diamond (or diamond simulant) (C) — gemstone

Diamond (or diamond simulant)

C

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Amethyst (Silicon dioxide with iron impurities (SiO2:Fe3+)) — mineral

Amethyst

Silicon dioxide with iron impurities (SiO2:Fe3+)

Mahogany Obsidian (Volcanic Glass with Hematite/Magnetite inclusions (SiO2 + Fe2O3)) — igneous

Mahogany Obsidian

Volcanic Glass with Hematite/Magnetite inclusions (SiO2 + Fe2O3)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Red Jasper (with Quartz and Chert) (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — sedimentary

Red Jasper (with Quartz and Chert)

Silicon Dioxide (SiO2) with Iron Oxide inclusions