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

Jasper (Silicon Dioxide (SiO2) microcrystalline quartz) — sedimentary

Jasper

Silicon Dioxide (SiO2) microcrystalline quartz

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

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite/Iron Oxide inclusions

Blue Goldstone (Aventurine Glass) — man-made glass

Blue Goldstone

Aventurine Glass

Jasper with Quartz Vein (Silicon Dioxide (SiO2) with impurities) — sedimentary

Jasper with Quartz Vein

Silicon Dioxide (SiO2) with impurities

Jasper (Silicon dioxide (SiO2) with iron oxide impurities) — sedimentary

Jasper

Silicon dioxide (SiO2) with iron oxide impurities

Blue Goldstone (Aventurine Glass) — Man-made glass (often grouped with minerals in lapidary)

Blue Goldstone

Aventurine Glass

Man-made glass (often grouped with minerals in lapidary)

Green Jasper (Silicon Dioxide (SiO2)) — sedimentary

Green Jasper

Silicon Dioxide (SiO2)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Red Jasper (Silicon Dioxide (SiO2)) — sedimentary

Red Jasper

Silicon Dioxide (SiO2)

Pyrite (Iron Pyrites) (Iron Sulfide (FeS2)) — mineral

Pyrite (Iron Pyrites)

Iron Sulfide (FeS2)

Jasper and Ironstone (likely Jasperized Ironstone) (Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)) — sedimentary

Jasper and Ironstone (likely Jasperized Ironstone)

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)

Weathered quartz-rich rock fragment (Likely quartz-bearing feldspathic rock; exact identification requires testing) — mineral

Weathered quartz-rich rock fragment

Likely quartz-bearing feldspathic rock; exact identification requires testing

Milky rose quartz (Quartz, silicon dioxide (SiO₂), pink variety likely colored by trace elements or microscopic inclusions) — mineral

Milky rose quartz

Quartz, silicon dioxide (SiO₂), pink variety likely colored by trace elements or microscopic inclusions

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

Amethyst

Silicon dioxide (SiO2) with iron impurities

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

Citrine (Tumbled Quartz)

Silicon Dioxide (SiO2)

Blue Topaz (specifically London Blue shade) (Topaz - Al2SiO4(F,OH)2) — mineral

Blue Topaz (specifically London Blue shade)

Topaz - Al2SiO4(F,OH)2

Granite (Granitoid) — igneous

Granite

Granitoid

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Weathered quartz-rich pebble (probable quartzite or quartz vein fragment) (Quartzite, predominantly silicon dioxide (SiO₂); exact identification is uncertain from the photograph) — metamorphic

Weathered quartz-rich pebble (probable quartzite or quartz vein fragment)

Quartzite, predominantly silicon dioxide (SiO₂); exact identification is uncertain from the photograph

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

Smoky Quartz

Quartz (Silicon Dioxide) - SiO2

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

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

Amethyst

SiO2 (Silicon Dioxide with iron impurities and irradiation)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Amethyst Cluster

Silicon Dioxide (SiO2 with iron impurities)

Native copper nugget (Copper (Cu), commonly with cuprite and copper-oxide alteration) — mineral

Native copper nugget

Copper (Cu), commonly with cuprite and copper-oxide alteration

Jasper and Quartz River Cobble (Silicon Dioxide (SiO2) with Hematite inclusions) — Sedimentary / Metamorphic

Jasper and Quartz River Cobble

Silicon Dioxide (SiO2) with Hematite inclusions

Sedimentary / Metamorphic

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

Yellow Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Quartz (milky quartz), possibly calcite (Quartz: SiO₂; visual identification is uncertain because the specimen is wet and lacks diagnostic crystal faces) — mineral

Quartz (milky quartz), possibly calcite

Quartz: SiO₂; visual identification is uncertain because the specimen is wet and lacks diagnostic crystal faces

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

Chert / Quartz Pebble

Cryptocrystalline Quartz (SiO2)

Iron-stained Quartz / Chalcedony Pebble (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — mineral

Iron-stained Quartz / Chalcedony Pebble

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Smoky Quartz and Citrine (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz and Citrine

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

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

Citrine Quartz Geode

Silicon Dioxide (SiO2) with iron impurities

Ferruginous Quartz (Hematoid Quartz) (Silicon Dioxide (SiO2) with Hematite or Goethite inclusions) — mineral

Ferruginous Quartz (Hematoid Quartz)

Silicon Dioxide (SiO2) with Hematite or Goethite inclusions

Silicon (Element Si) — mineral

Silicon

Element Si

Man-made Green Quartz (Lab-grown or Treated) (Silicon Dioxide (SiO2) with artificial coloration) — mineral

Man-made Green Quartz (Lab-grown or Treated)

Silicon Dioxide (SiO2) with artificial coloration

Sapphire (Corundum (Al2O3)) — mineral

Sapphire

Corundum (Al2O3)

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

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

Amethyst

Silicon Dioxide (SiO2), Quartz variety

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

Amethyst

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