Rock Identifier

Category

Tektite (Natural Glass)

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

Iron-stained Quartz (Silicon Dioxide (SiO2) with Hematite/Limonite impurities) — mineral

Iron-stained Quartz

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Lepidolite (Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)) — mineral

Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Herkimer Diamond (Quartz (Silicon Dioxide, SiO2)) — mineral

Herkimer Diamond

Quartz (Silicon Dioxide, SiO2)

Amethyst (Amethyst (Silica mineral, SiO2)) — mineral

Amethyst

Amethyst (Silica mineral, SiO2)

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

Amethyst

SiO2 (Silicon Dioxide with Iron impurities and irradiation)

Amethyst (vibrant lilac/purple variety) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst (vibrant lilac/purple variety)

Silicon Dioxide (SiO2) with iron impurities

Amethyst (SiO2 (Silicon Dioxide) with Iron (Fe3+) impurities) — mineral

Amethyst

SiO2 (Silicon Dioxide) with Iron (Fe3+) impurities

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

Amethyst

Amethyst (Silicon Dioxide, SiO2 + Fe4+ impurities)

Fluorite (Polished Point/Tower) (Calcium Fluoride (CaF2)) — mineral

Fluorite (Polished Point/Tower)

Calcium Fluoride (CaF2)

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

Amethyst

Silicon Dioxide with iron impurities (SiO2)

Fluorite (Rainbow Fluorite Point) (Calcium Fluoride (CaF2)) — mineral

Fluorite (Rainbow Fluorite Point)

Calcium Fluoride (CaF2)

Quartz Veined Basalt Pebble (Amygdaloidal Basalt with Quartz (SiO2) veining) — igneous

Quartz Veined Basalt Pebble

Amygdaloidal Basalt with Quartz (SiO2) veining

Herkimer Diamond (Quartz (Silicon Dioxide, SiO2)) — mineral

Herkimer Diamond

Quartz (Silicon Dioxide, SiO2)

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

Yellow Quartz (Citrine Quartz)

Silicon Dioxide (SiO2)

Dream Amethyst (Chevron Amethyst) (Silicon Dioxide (SiO2) with impurities of Iron (Fe3+)) — mineral

Dream Amethyst (Chevron Amethyst)

Silicon Dioxide (SiO2) with impurities of Iron (Fe3+)

Banded Agate (Tumbled) (Agate (Silicon Dioxide, SiO2 - Cryptocrystalline Quartz)) — mineral

Banded Agate (Tumbled)

Agate (Silicon Dioxide, SiO2 - Cryptocrystalline Quartz)

Rose Quartz (Silicon Dioxide (SiO2)) — mineral

Rose Quartz

Silicon Dioxide (SiO2)

Herkimer Diamond (Quartz (Silicon Dioxide) - SiO2) — mineral

Herkimer Diamond

Quartz (Silicon Dioxide) - SiO2

Dyed Quartz (often sold as 'Blue Quartz' or 'Blue Agate') (Silicon Dioxide (SiO2) with artificial pigment) — mineral

Dyed Quartz (often sold as 'Blue Quartz' or 'Blue Agate')

Silicon Dioxide (SiO2) with artificial pigment

Amethyst (Silicon Dioxide (SiO2)) — mineral

Amethyst

Silicon Dioxide (SiO2)

Optical Calcite (Iceland Spar) (Calcite (Calcium Carbonate, CaCO3)) — mineral

Optical Calcite (Iceland Spar)

Calcite (Calcium Carbonate, CaCO3)

Emerald (Beryl (Be3Al2(SiO3)6) with trace Chromium/Vanadium) — mineral

Emerald

Beryl (Be3Al2(SiO3)6) with trace Chromium/Vanadium

Blue Sapphire (faceted in jewelry) (Corundum (Al2O3)) — mineral

Blue Sapphire (faceted in jewelry)

Corundum (Al2O3)

Green Fluorite (Beaded) (Fluorite (Calcium Fluoride, CaF2)) — mineral

Green Fluorite (Beaded)

Fluorite (Calcium Fluoride, CaF2)

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

Amethyst

Amethyst (Silicon Dioxide, SiO2 with Iron impurities)

Red Jasper (Polished) (Silicon Dioxide (SiO2) with Hematite inclusions) — sedimentary

Red Jasper (Polished)

Silicon Dioxide (SiO2) with Hematite inclusions

Yellow Jasper (Chalcedony (SiO2 with iron impurities)) — sedimentary

Yellow Jasper

Chalcedony (SiO2 with iron impurities)

Jasper (Jasper (Silicon Dioxide, SiO2)) — sedimentary

Jasper

Jasper (Silicon Dioxide, SiO2)

Jasper (brecciated or orbicular variety) (Silicon dioxide (SiO2) with iron oxide inclusions) — sedimentary/mineral

Jasper (brecciated or orbicular variety)

Silicon dioxide (SiO2) with iron oxide inclusions

sedimentary/mineral

Green Jasper (Silicon Dioxide (SiO2) with impurities) — sedimentary

Green Jasper

Silicon Dioxide (SiO2) with impurities

Red Jasper (Tumbled) (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary/mineral

Red Jasper (Tumbled)

Silicon Dioxide (SiO2) with iron oxide inclusions

sedimentary/mineral

Granite (Phaneritic intrusive igneous rock (consisting mainly of Quartz, Alkali Feldspar, and Plagioclase)) — igneous

Granite

Phaneritic intrusive igneous rock (consisting mainly of Quartz, Alkali Feldspar, and Plagioclase)

Citrine Geode Fragment (Citrine (Silicon Dioxide with Iron Impurities), SiO2) — mineral

Citrine Geode Fragment

Citrine (Silicon Dioxide with Iron Impurities), SiO2

Red Jasper (Skull Carving) (Jasper, a cryptocrystalline variety of Quartz (SiO2)) — sedimentary

Red Jasper (Skull Carving)

Jasper, a cryptocrystalline variety of Quartz (SiO2)

Red Jasper (Silicon dioxide (SiO2) with hematite impurities) — sedimentary

Red Jasper

Silicon dioxide (SiO2) with hematite impurities

Jasper (Jasper (Silica/Silicon Dioxide, SiO2)) — sedimentary

Jasper

Jasper (Silica/Silicon Dioxide, SiO2)

Red Jasper (River Siltstone) (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Red Jasper (River Siltstone)

Silicon Dioxide (SiO2) with iron oxide inclusions

Jasper (Red Jasper) (Silicon Dioxide (SiO₂)) — sedimentary

Jasper (Red Jasper)

Silicon Dioxide (SiO₂)

Yellow Jasper (Silicon Dioxide (SiO2) with Goethite/Limonite inclusions) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite/Limonite inclusions

Yellow Quartz (Iron-Stained Quartz) (Silicon Dioxide (SiO2) with iron oxide inclusions) — mineral

Yellow Quartz (Iron-Stained Quartz)

Silicon Dioxide (SiO2) with iron oxide inclusions

White Topaz (Al2SiO4(F,OH)2) — mineral

White Topaz

Al2SiO4(F,OH)2

Quartzite (Lithic Artifact) (Quartzite (SiO2)) — metamorphic

Quartzite (Lithic Artifact)

Quartzite (SiO2)