Rock Identifier

Category

Anthropogenic Specimen (Man Made)

Browse anthropogenic specimen (man made) specimens identified by the Rock Identifier community.

Porphyritic Basalt (Chinese Writing Stone or Flower Stone) (Porphyritic Basalt / Porphyry) — igneous

Porphyritic Basalt (Chinese Writing Stone or Flower Stone)

Porphyritic Basalt / Porphyry

igneous
Citrine (Silicon Dioxide (SiO2)) — mineral

Citrine

Silicon Dioxide (SiO2)

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

Rose Quartz

Quartz (Silicon Dioxide, SiO2)

mineral
Amazonite (Potassium aluminum silicate (Microcline); KAlSi3O8) — mineral

Amazonite

Potassium aluminum silicate (Microcline); KAlSi3O8

mineral
Amazonite (or Amazon Stone) (Potassium Feldspar (Microcline), K(AlSi3O8)) — mineral

Amazonite (or Amazon Stone)

Potassium Feldspar (Microcline), K(AlSi3O8)

mineral
Red Jasper (Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)) — sedimentary

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)

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

Breciated Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

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

Clear Quartz

SiO2 (Silicon Dioxide)

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

Milky Quartz

Silicon Dioxide (SiO2)

mineral
Rose Quartz (Silicon Dioxide (SiO2)) — mineral

Rose Quartz

Silicon Dioxide (SiO2)

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

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

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide inclusions

mineral
Agate Geode (Chalcedony (cryptocrystalline SiO2)) — mineral

Agate Geode

Chalcedony (cryptocrystalline SiO2)

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

Amethyst (vibrant lilac/purple variety)

Silicon Dioxide (SiO2) with iron impurities

mineral
Prehnite (Prehnite - Ca2Al(AlSi3O10)(OH)2) — mineral

Prehnite

Prehnite - Ca2Al(AlSi3O10)(OH)2

mineral
Rose Quartz (Silicon dioxide (SiO2)) — mineral

Rose Quartz

Silicon dioxide (SiO2)

mineral
Sandstone with Liesegang Rings (Arenite with Iron Oxide Concretions) — sedimentary

Sandstone with Liesegang Rings

Arenite with Iron Oxide Concretions

sedimentary
Rose Quartz (Aura Quartz) (Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese) — mineral

Rose Quartz (Aura Quartz)

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

mineral
Quartzite Pebble (Quartzite (primarily SiO2)) — metamorphic

Quartzite Pebble

Quartzite (primarily SiO2)

metamorphic
Feldspar Rich Granite with Limonite Staining (K-Feldspar Granite (KAlSi3O8)) — igneous

Feldspar Rich Granite with Limonite Staining

K-Feldspar Granite (KAlSi3O8)

igneous
Chert (specifically Flint or Dark Chalcedony) (Silicon Dioxide (SiO2)) — sedimentary

Chert (specifically Flint or Dark Chalcedony)

Silicon Dioxide (SiO2)

sedimentary
Chert (Fossiliferous) (Silicon dioxide (SiO2)) — sedimentary

Chert (Fossiliferous)

Silicon dioxide (SiO2)

sedimentary
Pink Quartz (Rose Quartz) (Silicon Dioxide (SiO2)) — mineral

Pink Quartz (Rose Quartz)

Silicon Dioxide (SiO2)

mineral
Chert (including varieties like Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (including varieties like Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

sedimentary
Calcite (or Alabaster, if truly carved) (Calcium Carbonate (CaCO3)) — Mineral/Rock

Calcite (or Alabaster, if truly carved)

Calcium Carbonate (CaCO3)

Mineral/Rock
Basalt (River Pebble) (Basalt (dominated by Plagioclase Feldspar and Pyroxene)) — igneous

Basalt (River Pebble)

Basalt (dominated by Plagioclase Feldspar and Pyroxene)

igneous
Diamond (Diamond (pure carbon, C)) — mineral

Diamond

Diamond (pure carbon, C)

mineral
Basalt River Stone (Basalt (Mafic volcanic rock)) — igneous

Basalt River Stone

Basalt (Mafic volcanic rock)

igneous
Chert (variations include Flint or Jasper) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (variations include Flint or Jasper)

Chert (Silicon Dioxide, SiO2)

sedimentary
Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

mineral
Chert (Chert Nodule) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (Chert Nodule)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

sedimentary
Gold (Aurum (Au)) — Mineral (Metal)

Gold

Aurum (Au)

Mineral (Metal)
Quartz Geode (partially formed) (Silicon Dioxide (SiO2)) — mineral

Quartz Geode (partially formed)

Silicon Dioxide (SiO2)

mineral
River Quartz (Milky and Smoky mix) (Silicon Dioxide (SiO2)) — mineral

River Quartz (Milky and Smoky mix)

Silicon Dioxide (SiO2)

mineral
Snowflake Obsidian (Obsidian with Cristobalite inclusions (70–75% SiO2)) — igneous

Snowflake Obsidian

Obsidian with Cristobalite inclusions (70–75% SiO2)

igneous
Graphite (Graphite (Native Carbon, C)) — metamorphic

Graphite

Graphite (Native Carbon, C)

metamorphic
Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

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

Quartz Pebble

Silicon Dioxide (SiO2)

mineral
Chert (Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline Quartz (SiO2)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

mineral
Quartz (Milky/Common Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Common Quartz)

Silicon Dioxide (SiO2)

mineral
White Quartz Sphere (Silicon Dioxide (SiO2)) — mineral

White Quartz Sphere

Silicon Dioxide (SiO2)

mineral