Rock Identifier

Category

Mineral Like (Natural Glass)

Browse mineral like (natural glass) specimens identified by the Rock Identifier community.

Learn about Mineral Like (Natural Glass) in the encyclopedia

Obsidian

Black Obsidian

Macusanite

Baddeleyite

Green Obsidian

Blue Obsidian

Maskelynite

Midnight Obsidian

Sideromelane

Yellow-Green Obsidian

Yellow-Green Obsidian

Pink Obsidian

Perlite

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Bull Quartz (Milky Quartz) (Silicon Dioxide (SiO2)) — mineral

Bull Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Opalite (Man-made synthetic glass with opalescent effects (SiO2 + metal oxides)) — mineraloid

Opalite

Man-made synthetic glass with opalescent effects (SiO2 + metal oxides)

Blue Sapphire (likely lab-grown or treated) (Corundum (Aluminum Oxide, Al2O3)) — gemstone

Blue Sapphire (likely lab-grown or treated)

Corundum (Aluminum Oxide, Al2O3)

Diamond (C (Carbon)) — mineral

Diamond

C (Carbon)

Green Jasper (Silicon Dioxide (SiO2) with iron and silicate inclusions) — sedimentary

Green Jasper

Silicon Dioxide (SiO2) with iron and silicate inclusions

Smoky Quartz with Rutile Inclusions (Silicon Dioxide (SiO2) with TiO2 needles) — mineral

Smoky Quartz with Rutile Inclusions

Silicon Dioxide (SiO2) with TiO2 needles

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

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Chert (Green Jasper) (Microcrystalline Quartz (SiO2) with iron silicate inclusions) — sedimentary

Chert (Green Jasper)

Microcrystalline Quartz (SiO2) with iron silicate inclusions

Chert / Chalcedony Pebble (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert / Chalcedony Pebble

Cryptocrystalline Quartz (SiO2)

Oco Geode (Silicon Dioxide (SiO2) with various inclusions) — mineral

Oco Geode

Silicon Dioxide (SiO2) with various inclusions

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz pebble (Silicon dioxide (SiO2)) — mineral

Quartz pebble

Silicon dioxide (SiO2)

Granite Pebble (Intrusive Igneous Rock) — igneous

Granite Pebble

Intrusive Igneous Rock

Diamond (or Diamond Simulant) (Carbon (C) or Cubic Zirconia (ZrO2)) — gemstone

Diamond (or Diamond Simulant)

Carbon (C) or Cubic Zirconia (ZrO2)

Chakra Stone Tower (Composite Multi-Mineral) (Crystalline Silicon Dioxide composite (SiO2) with various inclusions) — mineral

Chakra Stone Tower (Composite Multi-Mineral)

Crystalline Silicon Dioxide composite (SiO2) with various inclusions

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

Aventurine

Silicon Dioxide (SiO2 with inclusions of Fuchsite mica)

Quartz pebble (Silicon dioxide (SiO2)) — mineral

Quartz pebble

Silicon dioxide (SiO2)

Obsidian (Volcanic Glass (SiO2)) — igneous

Obsidian

Volcanic Glass (SiO2)

Granite (Intrusive igneous felsic rock) — igneous

Granite

Intrusive igneous felsic rock

Aventurine (Aventurine Quartz (SiO2 with inclusions of Fuchsite)) — metamorphic

Aventurine

Aventurine Quartz (SiO2 with inclusions of Fuchsite)

Smoky Quartz (SiO2 (Silicon Dioxide)) — Mineral

Smoky Quartz

SiO2 (Silicon Dioxide)

Chalcedony Geode Fragment (Silicon Dioxide (SiO2)) — mineral

Chalcedony Geode Fragment

Silicon Dioxide (SiO2)

Ferruginous Quartz (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — mineral

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Iron Slag (Anthropogenic Ferro-silicate) — mineral

Iron Slag

Anthropogenic Ferro-silicate

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Goldstone (Aventurine Glass (SiO2 + Cu small inclusions)) — man-made glass mineral simulant

Goldstone

Aventurine Glass (SiO2 + Cu small inclusions)

man-made glass mineral simulant

Quartz Geode (Smoky Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz Geode (Smoky Quartz)

Silicon Dioxide (SiO2)

Beach Pebble (Basalt / Greywacke) (Basalt (or fine-grained Sedimentary Greywacke)) — igneous

Beach Pebble (Basalt / Greywacke)

Basalt (or fine-grained Sedimentary Greywacke)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Emerald in Matrix (Beryl (Be3Al2(SiO3)6) embedded in schist or pegmatite host rock) — mineral

Emerald in Matrix

Beryl (Be3Al2(SiO3)6) embedded in schist or pegmatite host rock

Pumice (Pumice (volcanic glass with vesicular texture)) — igneous

Pumice

Pumice (volcanic glass with vesicular texture)

Amethyst (Tumbled) (Amethyst (Silicon Dioxide, SiO2 + Fe4+)) — mineral

Amethyst (Tumbled)

Amethyst (Silicon Dioxide, SiO2 + Fe4+)

Citrine Quartz (likely heat-treated) (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz (likely heat-treated)

Silicon Dioxide (SiO2)

Sandstone (Sandstone (SiO2 dominant)) — sedimentary

Sandstone

Sandstone (SiO2 dominant)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Desert Rose (Baryte (BaSO4) or Gypsum (CaSO4·2H2O) with sand inclusions) — mineral

Desert Rose

Baryte (BaSO4) or Gypsum (CaSO4·2H2O) with sand inclusions

Obsidian (Volcanic glass (silica-rich rhyolitic melt; primarily SiO₂)) — igneous

Obsidian

Volcanic glass (silica-rich rhyolitic melt; primarily SiO₂)

Quartz (Variety: Agate / Chalcedony) (Silicon Dioxide (SiO2)) — sedimentary

Quartz (Variety: Agate / Chalcedony)

Silicon Dioxide (SiO2)

Diamond (or Simulant) (Carbon (C) or Cubic Zirconia (ZrO2)) — gemstone

Diamond (or Simulant)

Carbon (C) or Cubic Zirconia (ZrO2)

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

Yellow Quartz Pebble (Citrine or Iron-Stained Quartz)

Silicon Dioxide (SiO2)