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

Aquamarine (Beryl (Be3Al2Si6O18 with iron impurities)) — mineral

Aquamarine

Beryl (Be3Al2Si6O18 with iron impurities)

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

Lepidolite

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

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

Smoky Quartz Cluster

Silicon Dioxide (SiO2)

Jasper / Quartz Pebble (Silicon dioxide (SiO2)) — sedimentary

Jasper / Quartz Pebble

Silicon dioxide (SiO2)

Green Quartzite (or Green Jasper) (Silica (Silicon Dioxide, SiO2) with inclusions) — metamorphic

Green Quartzite (or Green Jasper)

Silica (Silicon Dioxide, SiO2) with inclusions

Amethyst (Quartz (Silicon Dioxide, SiO2)) — gemstone

Amethyst

Quartz (Silicon Dioxide, SiO2)

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

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

Amethyst

Silicon Dioxide (SiO2) with Fe3+ impurities

Citrine (Silicon dioxide (SiO2)) — mineral

Citrine

Silicon dioxide (SiO2)

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

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

Smoky Quartz

Smoky Quartz (Silicon Dioxide, SiO2)

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

Amethyst (Chevron Amethyst)

Silicon Dioxide (SiO2) with iron impurities

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

River Quartz / Quartzite Pebbles (Quartzite (primarily Silicon Dioxide, SiO2)) — metamorphic

River Quartz / Quartzite Pebbles

Quartzite (primarily Silicon Dioxide, SiO2)

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Citrine (Silicon Dioxide (SiO2) with trace Iron) — mineral

Citrine

Silicon Dioxide (SiO2) with trace Iron

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

Amethyst Quartz

Silicon Dioxide (SiO2) with iron impurities

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

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

Tumbled Amethyst Quartz

Silicon Dioxide (SiO2) with iron impurities

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

Blue Topaz

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

Tumbled carnelian/chalcedony (Cryptocrystalline quartz, SiO₂ (iron-bearing chalcedony)) — mineral

Tumbled carnelian/chalcedony

Cryptocrystalline quartz, SiO₂ (iron-bearing chalcedony)

Tahitian Pearl (Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3) — mineral

Tahitian Pearl

Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3

Smoky Quartz and Feldspar Pegmatite (Granitic Pegmatite (chiefly SiO2 and KAlSi3O8)) — igneous

Smoky Quartz and Feldspar Pegmatite

Granitic Pegmatite (chiefly SiO2 and KAlSi3O8)

Sandstone (Quartzose Pebble) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (Quartzose Pebble)

Arenite (composed primarily of SiO2)

Quartzite River Rock (Metamorphic Rock (Quartzite)) — metamorphic

Quartzite River Rock

Metamorphic Rock (Quartzite)

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Emerald (Tumbled Beryl) (Beryllium Aluminum Silicate (Be3Al2Si6O18) with Chromium/Vanadium impurities) — mineral

Emerald (Tumbled Beryl)

Beryllium Aluminum Silicate (Be3Al2Si6O18) with Chromium/Vanadium impurities

Halite (Halite (Sodium Chloride, NaCl)) — mineral

Halite

Halite (Sodium Chloride, NaCl)

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

White Topaz

Topaz - Al2SiO4(F,OH)2

Quartzite (Quartzite (Metamorphic rock primarily composed of SiO2)) — metamorphic

Quartzite

Quartzite (Metamorphic rock primarily composed of SiO2)

Tumbled Jasper (Silicon dioxide with impurities (Microcrystalline Quartz, SiO2)) — sedimentary

Tumbled Jasper

Silicon dioxide with impurities (Microcrystalline Quartz, SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Jasper Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper Pebble

Microcrystalline Quartz (SiO2)

Pyrite in Matrix (likely Quartz or Schist matrix) (Iron Sulfide (FeS2)) — mineral

Pyrite in Matrix (likely Quartz or Schist matrix)

Iron Sulfide (FeS2)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

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

Jasper (Chert)

Silicon Dioxide (SiO2) with iron oxide inclusions

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

Jasper Pebble

Silicon Dioxide (SiO2) with iron oxide inclusions

Yellow Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — mineral

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Rough Quartz in Pegmatite Matrix (Quartz (Silicon Dioxide - SiO2) in Granitic Pegmatite) — igneous

Rough Quartz in Pegmatite Matrix

Quartz (Silicon Dioxide - SiO2) in Granitic Pegmatite

Red Jasper (possibly Carnelian) (Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)) — sedimentary

Red Jasper (possibly Carnelian)

Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)

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

Brown Quartz Pebble

Silicon Dioxide (SiO2)