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

Obsidian (Volcanic Glass) — igneous

Obsidian

Volcanic Glass

Obsidian (Volcanic glass) — igneous

Obsidian

Volcanic glass

Black Obsidian (Volcanic glass) — igneous

Black Obsidian

Volcanic glass

Obsidian (Volcanic glass) — igneous

Obsidian

Volcanic glass

Obsidian (Volcanic Glass) — igneous

Obsidian

Volcanic Glass

Obsidian (Volcanic Glass) — igneous

Obsidian

Volcanic Glass

Obsidian (Volcanic glass) — igneous

Obsidian

Volcanic glass

Obsidian (Volcanic glass) — igneous

Obsidian

Volcanic glass

Obsidian (Volcanic glass) — igneous

Obsidian

Volcanic glass

Colorless quartz crystal (likely quartz fragment) (Quartz, silicon dioxide (SiO₂)) — mineral

Colorless quartz crystal (likely quartz fragment)

Quartz, silicon dioxide (SiO₂)

Blue slag glass / industrial smelter slag (Man-made iron-rich silicate slag; composition variable, commonly Fe–Ca–Mg–Al silicates with glassy phases) — mineral

Blue slag glass / industrial smelter slag

Man-made iron-rich silicate slag; composition variable, commonly Fe–Ca–Mg–Al silicates with glassy phases

Tumbled white chalcedony (likely milky quartz) (Chalcedony, microcrystalline quartz (SiO₂)) — mineral

Tumbled white chalcedony (likely milky quartz)

Chalcedony, microcrystalline quartz (SiO₂)

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

Snowflake Obsidian

Spherulitic Obsidian (primarily SiO2 with Cristobalite inclusions)

Tumbled milky quartz (Quartz — silicon dioxide (SiO₂), cryptocrystalline or microcrystalline variety possible) — mineral

Tumbled milky quartz

Quartz — silicon dioxide (SiO₂), cryptocrystalline or microcrystalline variety possible

Cobalt Blue Sea Glass (Amorphous Silica Glass (SiO2 + CoO)) — mineraloid / anthropogenic material

Cobalt Blue Sea Glass

Amorphous Silica Glass (SiO2 + CoO)

mineraloid / anthropogenic material

Tektite (Indochinite) (Natural glass (High-silica impact glass)) — mineral

Tektite (Indochinite)

Natural glass (High-silica impact glass)

Obsidian (Volcanic Glass (Amorphous SiO2-rich glass)) — Igneous

Obsidian

Volcanic Glass (Amorphous SiO2-rich glass)

Slag Glass (Amorphous Silica / Glass Slag) — industrial byproduct (anthropogenic rock-like material)

Slag Glass

Amorphous Silica / Glass Slag

industrial byproduct (anthropogenic rock-like material)

Obsidian (Volcanic Glass) — igneous

Obsidian

Volcanic Glass

Obsidian (Volcanic Glass) — igneous

Obsidian

Volcanic Glass

Obsidian (Volcanic Glass) — igneous

Obsidian

Volcanic Glass

Obsidian (Volcanic Glass) — igneous

Obsidian

Volcanic Glass

Obsidian (Volcanic Glass) — igneous

Obsidian

Volcanic Glass

Obsidian (Volcanic glass) — igneous

Obsidian

Volcanic glass

Obsidian (Volcanic glass) — igneous

Obsidian

Volcanic glass

Snowflake Obsidian (Volcanic Glass (SiO2 + impurities)) — igneous

Snowflake Obsidian

Volcanic Glass (SiO2 + impurities)

Blue goldstone (Man-made aventurine glass containing metallic copper particles; not a natural mineral) — mineral

Blue goldstone

Man-made aventurine glass containing metallic copper particles; not a natural mineral

Blue Sea Glass (Amorphous Silica (Anthropogenic glass)) — not a rock (man-made origin)

Blue Sea Glass

Amorphous Silica (Anthropogenic glass)

not a rock (man-made origin)

Snowflake Obsidian (Spherulitic Volcanic Glass (primarily SiO2)) — igneous

Snowflake Obsidian

Spherulitic Volcanic Glass (primarily SiO2)

Milky quartz-bearing rock, possibly quartzite (Quartz (SiO₂), likely in a quartzite or quartz-rich metamorphic matrix) — metamorphic

Milky quartz-bearing rock, possibly quartzite

Quartz (SiO₂), likely in a quartzite or quartz-rich metamorphic matrix

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

Muscovite Mica

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

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

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite

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

Muscovite Mica

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

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

Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Milky Quartz with inclusions (Silicon Dioxide (SiO2)) — mineral

Milky Quartz with inclusions

Silicon Dioxide (SiO2)

Cullet Glass (Slag Glass) (Amorphous Silicon Dioxide (Industrial Man-made)) — mineraloid

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (Industrial Man-made)

Colorless faceted gemstone (likely glass or cubic zirconia) (Likely cubic zirconia, ZrO₂; exact identification is uncertain from the photograph) — gemstone

Colorless faceted gemstone (likely glass or cubic zirconia)

Likely cubic zirconia, ZrO₂; exact identification is uncertain from the photograph

Pink Quartz / Sea Glass (Silicon Dioxide (SiO2)) — mineral

Pink Quartz / Sea Glass

Silicon Dioxide (SiO2)

Obsidian (Obsidian (Volcanic Glass, SiO2 + impurities)) — igneous

Obsidian

Obsidian (Volcanic Glass, SiO2 + impurities)

Likely quartz or quartz-rich pebble (Quartz (SiO₂), possibly milky quartz or a small quartzite fragment) — mineral

Likely quartz or quartz-rich pebble

Quartz (SiO₂), possibly milky quartz or a small quartzite fragment

Green Aventurine (Aventurine Quartz (SiO2 + Fuchsite mica)) — Mineral

Green Aventurine

Aventurine Quartz (SiO2 + Fuchsite mica)

Sea Glass (Amorphous silicon dioxide (glass)) — mineral

Sea Glass

Amorphous silicon dioxide (glass)