Rock Identifier

Category

Synthetic (Glass)

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

Learn about Synthetic (Glass) in the encyclopedia

Opalite

Yttrium Aluminum Garnet

Yttrium Aluminum Garnet

Zincite

Sideromelane

Lead Feldspar

Black Obsidian

Maskelynite

Tachylite

Obsidian

Hyalite Opal

Perlite

Macusanite

Quartz with Muscovite Mica (Silicon Dioxide (SiO2) with Potassium Aluminum Silicate Hydroxide (KAl2(AlSi3O10)(OH)2)) — mineral

Quartz with Muscovite Mica

Silicon Dioxide (SiO2) with Potassium Aluminum Silicate Hydroxide (KAl2(AlSi3O10)(OH)2)

Muscovite Mica (with Schist) (Muscovite - KAl2(AlSi3O10)(OH)2) — metamorphic

Muscovite Mica (with Schist)

Muscovite - KAl2(AlSi3O10)(OH)2

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

Muscovite Mica

Muscovite - KAl2(AlSi3O10)(OH)2

Cullet Glass (Man-made Glass Slag) (Amorphous Silica (SiO2) with chemical additives) — Mineraloid

Cullet Glass (Man-made Glass Slag)

Amorphous Silica (SiO2) with chemical additives

Possible tumbled obsidian (Volcanic glass, primarily rhyolitic silica glass (SiO₂-rich)) — igneous

Possible tumbled obsidian

Volcanic glass, primarily rhyolitic silica glass (SiO₂-rich)

Polymer Clay (Mock Mineral) (Polyvinyl chloride (PVC) with plasticizers and pigment) — Synthetic material (Not a natural rock/mineral)

Polymer Clay (Mock Mineral)

Polyvinyl chloride (PVC) with plasticizers and pigment

Synthetic material (Not a natural rock/mineral)

Gastly (Trick or Trade Halloween Series) (Cellulose-carbonaceous composite (Lignocellulose laminated with pigmentary polymers)) — Mineral (Synthetic - Paper and Ink Polymorph)

Gastly (Trick or Trade Halloween Series)

Cellulose-carbonaceous composite (Lignocellulose laminated with pigmentary polymers)

Mineral (Synthetic - Paper and Ink Polymorph)

Hand-Drawn Trading Card (Amateur Artwork) (Cellulose-based substrate with wax/graphite/ink deposit (n/a for minerals)) — Organic/Synthetic Composite (Paper and Pigment)

Hand-Drawn Trading Card (Amateur Artwork)

Cellulose-based substrate with wax/graphite/ink deposit (n/a for minerals)

Organic/Synthetic Composite (Paper and Pigment)

Snowflake Obsidian (Obsidian with Cristobalite inclusions) — igneous

Snowflake Obsidian

Obsidian with Cristobalite inclusions

Blue Slag Glass (Man-made Silicon Dioxide (Amorphous)) — Anthropogenic (Man-made)

Blue Slag Glass

Man-made Silicon Dioxide (Amorphous)

Anthropogenic (Man-made)

Green Slag (Anthropogenic Silicate Glass) — Mineraloid (Industrial byproduct)

Green Slag

Anthropogenic Silicate Glass

Mineraloid (Industrial byproduct)

Cobalt Blue Slag Glass (Amorphous Silicon Dioxide (anthropogenic) with Cobalt additives) — mineraloid

Cobalt Blue Slag Glass

Amorphous Silicon Dioxide (anthropogenic) with Cobalt additives

Glass Nugget (Tumbled Glass) (Amorphous Silicon Dioxide (SiO2) with additives) — mineraloid (man-made)

Glass Nugget (Tumbled Glass)

Amorphous Silicon Dioxide (SiO2) with additives

mineraloid (man-made)

Goldstone and pink quartz bead strands (Goldstone is aventurescent copper-bearing glass; pink beads are likely rose quartz (SiO₂), though dyed or glass imitations are possible) — mineral

Goldstone and pink quartz bead strands

Goldstone is aventurescent copper-bearing glass; pink beads are likely rose quartz (SiO₂), though dyed or glass imitations are possible

Snowflake Obsidian (Volcanic Glass with Cristobalite inclusions) — igneous

Snowflake Obsidian

Volcanic Glass with Cristobalite inclusions

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

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

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

Mica (Muscovite)

Muscovite (KAl2(AlSi3O10)(OH)2)

Muscovite Mica in Quartz Matrix (Muscovite (KAl2(AlSi3O10)(OH)2) in Quartz (SiO2)) — mineral

Muscovite Mica in Quartz Matrix

Muscovite (KAl2(AlSi3O10)(OH)2) in Quartz (SiO2)

Snowflake Obsidian (Spherulitic Obsidian (Volcanic Glass with Cristobalite)) — igneous

Snowflake Obsidian

Spherulitic Obsidian (Volcanic Glass with Cristobalite)

Blue Glass or Slag Glass (Amorphous Silica (Anthropogenic Glass)) — mineral

Blue Glass or Slag Glass

Amorphous Silica (Anthropogenic Glass)

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Black glassy fragment, likely obsidian or industrial glass (Volcanic glass (obsidian), chiefly amorphous SiO₂; identification uncertain from image) — mineral

Black glassy fragment, likely obsidian or industrial glass

Volcanic glass (obsidian), chiefly amorphous SiO₂; identification uncertain from image

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

Quartz (Clear Quartz)

Silicon Dioxide (SiO2)

Green Quartz / Chrysoprase / Sea Glass (Silicon Dioxide (SiO2)) — mineral

Green Quartz / Chrysoprase / Sea Glass

Silicon Dioxide (SiO2)

Slag Glass / Industrial Slag (Anthropogenic Glass) — man-made glass / industrial byproduct

Slag Glass / Industrial Slag

Anthropogenic Glass

man-made glass / industrial byproduct

Libyan Desert Glass (Libyan Desert Glass (Tektite / Impact Glass)) — meteorite

Libyan Desert Glass

Libyan Desert Glass (Tektite / Impact Glass)

Polished black stone sphere (likely black basalt or black tourmaline) (Most likely fine-grained basalt (plagioclase–pyroxene); mineral identification is uncertain from the image alone) — igneous

Polished black stone sphere (likely black basalt or black tourmaline)

Most likely fine-grained basalt (plagioclase–pyroxene); mineral identification is uncertain from the image alone

Obsidian (Volcanic Glass (predominantly SiO2)) — igneous

Obsidian

Volcanic Glass (predominantly SiO2)

Sea Glass (Frosted Glass) (Amorphous Silica (SiO2) with various metal oxide impurities) — Man-made material (Anthro-lithic product)

Sea Glass (Frosted Glass)

Amorphous Silica (SiO2) with various metal oxide impurities

Man-made material (Anthro-lithic product)

Cullet Glass (Slag Glass) (Amorphous Silicon Dioxide (Industrial byproduct)) — mineraloid

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (Industrial byproduct)

Clear quartz crystal/chunk (Quartz (silicon dioxide, SiO₂)) — mineral

Clear quartz crystal/chunk

Quartz (silicon dioxide, SiO₂)

Muscovite Mica (Muscovite [KAl2(AlSi3O10)(OH)2]) — mineral

Muscovite Mica

Muscovite [KAl2(AlSi3O10)(OH)2]

Muscovite Mica (Muscovite (KAl2(AlSi3O10)(F,OH)2)) — mineral

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(F,OH)2)

Granitic Pegmatite with Muscovite Mica (Pegmatite (containing KAl2(AlSi3O10)(OH)2)) — igneous

Granitic Pegmatite with Muscovite Mica

Pegmatite (containing KAl2(AlSi3O10)(OH)2)

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Beads (likely glass or man-made material) (N/A (artificial material)) — Man-made material, not a natural rock or mineral specimen

Beads (likely glass or man-made material)

N/A (artificial material)

Man-made material, not a natural rock or mineral specimen

Obsidian (Black) (Obsidian (High-silica volcanic glass)) — igneous

Obsidian (Black)

Obsidian (High-silica volcanic glass)

Tumbled quartz pebble, possibly citrine or iron-stained quartz (Quartz (SiO₂), likely microcrystalline or granular quartz) — mineral

Tumbled quartz pebble, possibly citrine or iron-stained quartz

Quartz (SiO₂), likely microcrystalline or granular quartz

Blue glass-like tumbled specimen (Most likely cobalt-blue slag glass or manufactured glass; not confidently identifiable as a natural mineral from the image) — mineral

Blue glass-like tumbled specimen

Most likely cobalt-blue slag glass or manufactured glass; not confidently identifiable as a natural mineral from the image

Flint or chert fragment (Microcrystalline quartz (SiO₂), likely flint/chert) — sedimentary

Flint or chert fragment

Microcrystalline quartz (SiO₂), likely flint/chert

Mica / Muscovite or Biotite (Phyllosilicate mineral group (e.g., KAl2(AlSi3O10)(OH)2)) — mineral

Mica / Muscovite or Biotite

Phyllosilicate mineral group (e.g., KAl2(AlSi3O10)(OH)2)

Obsidian (Volcanic glass) — igneous

Obsidian

Volcanic glass