Rock Identifier

Category

Tektite (Natural Glass)

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

Learn about Tektite (Natural Glass) in the encyclopedia

Macusanite

Moldavite

Obsidian

Black Obsidian

Green Obsidian

Blue Obsidian

Midnight Obsidian

Maskelynite

Pink Obsidian

Purple Obsidian

Purple Obsidian

Teal Obsidian

Yellow-Green Obsidian

Yellow-Green Obsidian

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Blue Sapphire (Corundum (Al2O3 with trace amounts of iron and titanium)) — mineral

Blue Sapphire

Corundum (Al2O3 with trace amounts of iron and titanium)

Blue Topaz (Aluminum silicate fluoride hydroxide (Al2SiO4(F, OH)2)) — mineral

Blue Topaz

Aluminum silicate fluoride hydroxide (Al2SiO4(F, OH)2)

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)

Citrine (Silicon Dioxide (Quartz variety), SiO2) — mineral

Citrine

Silicon Dioxide (Quartz variety), SiO2

Green Quartz (Prasiolite/Adventurine) (Silicon Dioxide with inclusions (SiO2)) — mineral

Green Quartz (Prasiolite/Adventurine)

Silicon Dioxide with inclusions (SiO2)

Jasper in Quartz (River Cobble) (Silicon Dioxide (SiO2) with Ferric Iron inclusions) — sedimentary

Jasper in Quartz (River Cobble)

Silicon Dioxide (SiO2) with Ferric Iron inclusions

Polished amethyst pyramid (Amethyst, purple quartz (SiO₂)) — mineral

Polished amethyst pyramid

Amethyst, purple quartz (SiO₂)

Peach Moonstone (Orange/Peach Feldspar) (Potassium aluminum silicate (KAlSi3O8)) — mineral

Peach Moonstone (Orange/Peach Feldspar)

Potassium aluminum silicate (KAlSi3O8)

Tumbled jasper (likely picture jasper or iron-rich jasper) (Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides) — sedimentary

Tumbled jasper (likely picture jasper or iron-rich jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Weathered quartz-rich rock, possibly sandstone or quartzite (Indeterminate; likely quartz sandstone (SiO₂-rich), possibly weakly metamorphosed quartzite) — sedimentary

Weathered quartz-rich rock, possibly sandstone or quartzite

Indeterminate; likely quartz sandstone (SiO₂-rich), possibly weakly metamorphosed quartzite

Silicon (Industrial Grade) (Elemental Silicon (Si)) — mineral

Silicon (Industrial Grade)

Elemental Silicon (Si)

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

Yellow Quartz Pebble

Silicon Dioxide (SiO2)

Smoky Quartz in Matrix (Silicon dioxide (SiO2) within Pegmatite/Gneiss) — igneous

Smoky Quartz in Matrix

Silicon dioxide (SiO2) within Pegmatite/Gneiss

Strawberry Quartz (Red Aventurine) (Silicon Dioxide (SiO2) with Hematite/Goethite inclusions) — mineral

Strawberry Quartz (Red Aventurine)

Silicon Dioxide (SiO2) with Hematite/Goethite inclusions

Citrine (Silicon dioxide (SiO2)) — mineral

Citrine

Silicon dioxide (SiO2)

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

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Orange Quartz (Silicon Dioxide (SiO2) with Hematite inclusions) — mineral

Orange Quartz

Silicon Dioxide (SiO2) with Hematite inclusions

Jasper (Jasper (Silicon Dioxide, SiO2 with iron oxide inclusions)) — sedimentary

Jasper

Jasper (Silicon Dioxide, SiO2 with iron oxide inclusions)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Pumice (Pumice (Amorphous volcanic glass)) — igneous

Pumice

Pumice (Amorphous volcanic glass)

Blue Topaz (Aluminum Silicate Fluoride Hydroxide, Al2SiO4(F,OH)2) — gemstone

Blue Topaz

Aluminum Silicate Fluoride Hydroxide, Al2SiO4(F,OH)2

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Tumbled smoky quartz (Quartz (SiO₂), smoky variety) — mineral

Tumbled smoky quartz

Quartz (SiO₂), smoky variety

Smoky Quartz (Silicon Dioxide (SiO2)) — gemstone

Smoky Quartz

Silicon Dioxide (SiO2)

Amethyst with Quartz Vein (SiO2 (Silicon Dioxide)) — mineral

Amethyst with Quartz Vein

SiO2 (Silicon Dioxide)

White quartzite pebble (Quartzite, composed predominantly of quartz (SiO₂)) — metamorphic

White quartzite pebble

Quartzite, composed predominantly of quartz (SiO₂)

Tumbled quartzite or quartz-rich stone (Quartzite; predominantly microcrystalline quartz (SiO₂)) — metamorphic

Tumbled quartzite or quartz-rich stone

Quartzite; predominantly microcrystalline quartz (SiO₂)

Halite (Himalayan Pink Salt) (Halite - NaCl (Sodium Chloride)) — Mineral (Evaporite)

Halite (Himalayan Pink Salt)

Halite - NaCl (Sodium Chloride)

Mineral (Evaporite)

Sandstone with Iron Oxide Coating (Arenite (SiO2 with Fe2O3 impurities)) — sedimentary

Sandstone with Iron Oxide Coating

Arenite (SiO2 with Fe2O3 impurities)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Citrine Quartz (Silicon Dioxide (SiO2) with iron impurities) — mineral

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

Leland Blue Stone (Anthropogenic Iron Smelting Slag) — mineraloid

Leland Blue Stone

Anthropogenic Iron Smelting Slag

Yellow Quartz (Citrine Quartz Pebble) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine Quartz Pebble)

Silicon Dioxide (SiO2)

Gold-bearing quartz vein specimen (Native gold (Au) in quartz (SiO₂), likely with iron-oxide staining) — mineral

Gold-bearing quartz vein specimen

Native gold (Au) in quartz (SiO₂), likely with iron-oxide staining

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

Quartz Crystal (Smoky Quartz)

Silicon Dioxide (SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Red Quartzite River Pebble (Quartzite (SiO2 with iron oxide inclusions)) — metamorphic

Red Quartzite River Pebble

Quartzite (SiO2 with iron oxide inclusions)

Diamond (Set in jewelry) (Cubic Carbon (C)) — mineral

Diamond (Set in jewelry)

Cubic Carbon (C)

Yellow Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)