Rock Identifier

Category

Not A Natural Rock

Browse not a natural rock specimens identified by the Rock Identifier community.

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

Rough Citrine Quartz

Silicon Dioxide (SiO2) with ferric iron impurities

Prasiolite (Silicon Dioxide (SiO2)) — mineral

Prasiolite

Silicon Dioxide (SiO2)

Cubic Zirconia (CZ) (Zirconium dioxide (ZrO2)) — mineral

Cubic Zirconia (CZ)

Zirconium dioxide (ZrO2)

Diamond (C (Carbon)) — mineral

Diamond

C (Carbon)

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

Druzy Quartz

Quartz (Silicon Dioxide, SiO2)

Rough Diamond (Diamond (pure Carbon, C)) — mineral

Rough Diamond

Diamond (pure Carbon, C)

Granite (Phaneritic Intrusive Igneous Rock (composed of Quartz, Feldspar, and Mica)) — igneous

Granite

Phaneritic Intrusive Igneous Rock (composed of Quartz, Feldspar, and Mica)

Pearl (Organic gemstone (Calcium carbonate - CaCO3)) — mineral

Pearl

Organic gemstone (Calcium carbonate - CaCO3)

Coquina (Bioclastic Limestone (Coquina)) — sedimentary

Coquina

Bioclastic Limestone (Coquina)

Pink Sapphire (Corundum (Al2O3 with trace Chromium and Iron)) — mineral

Pink Sapphire

Corundum (Al2O3 with trace Chromium and Iron)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Black Onyx (Silicon Dioxide (SiO2) with cryptocrystalline structure) — mineral

Black Onyx

Silicon Dioxide (SiO2) with cryptocrystalline structure

Granite (Phaneritic plutonic rock (dominated by SiO2, Al2O3, K2O, Na2O)) — igneous

Granite

Phaneritic plutonic rock (dominated by SiO2, Al2O3, K2O, Na2O)

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)

Granite (Granite (phaneritic intrusive igneous rock consisting mainly of quartz, alkali feldspar, and plagioclase)) — igneous

Granite

Granite (phaneritic intrusive igneous rock consisting mainly of quartz, alkali feldspar, and plagioclase)

Sandstone (with possibly iron oxides and other minerals) (Sandstone) — Sedimentary rock

Sandstone (with possibly iron oxides and other minerals)

Sandstone

Sedimentary rock

Turquoise (Hydrated copper and aluminum phosphate (CuAl6(PO4)4(OH)8·4H2O)) — mineral

Turquoise

Hydrated copper and aluminum phosphate (CuAl6(PO4)4(OH)8·4H2O)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Blue Sapphire (Synthetic or Man-made Glass Imitation) (Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic) — mineral

Blue Sapphire (Synthetic or Man-made Glass Imitation)

Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic

Turquoise (Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise

Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O

Man-made Polished Porcelain Tile (Artificial Geologic Lookalike) (Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)) — Synthetic (Ceramic)

Man-made Polished Porcelain Tile (Artificial Geologic Lookalike)

Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)

Synthetic (Ceramic)

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

Yellow Quartz (Rough)

Silicon Dioxide (SiO2)

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

Yellow Quartz (Citrine-colored Quartz Pebble)

Silicon Dioxide (SiO2)

Black Onyx (Silicon dioxide (SiO2) - Chalcedony variety) — mineral

Black Onyx

Silicon dioxide (SiO2) - Chalcedony variety

Slate (Foliated Metamorphic Rock (primarily composed of quartz, illite, chlorite, and micas)) — metamorphic

Slate

Foliated Metamorphic Rock (primarily composed of quartz, illite, chlorite, and micas)

Black Tourmaline (Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)) — mineral

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

Pebble (Clast (specifically a granule or small pebble)) — Sedimentary

Pebble

Clast (specifically a granule or small pebble)

Ferruginous Quartz (Silicon Dioxide (SiO2) with iron oxide inclusions (Limonite/Goethite)) — mineral

Ferruginous Quartz

Silicon Dioxide (SiO2) with iron oxide inclusions (Limonite/Goethite)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Oak-grain Laminate (Industrial/Decorative Furniture Finish) (Melamine Resin-impregnated Decorative Paper on Particleboard (Cellulose/Thermosetting Plastic)) — not a rock (synthetic material)

Oak-grain Laminate (Industrial/Decorative Furniture Finish)

Melamine Resin-impregnated Decorative Paper on Particleboard (Cellulose/Thermosetting Plastic)

not a rock (synthetic material)

Coquina (Limestone) (Bioclastic Limestone (CaCO3)) — sedimentary

Coquina (Limestone)

Bioclastic Limestone (CaCO3)

Glauconitic Sandstone (Greensand (Glauconite-bearing sandstone)) — sedimentary

Glauconitic Sandstone

Greensand (Glauconite-bearing sandstone)

Ruby (Corundum) (Aluminum Oxide (Al2O3) with Chromium traces) — mineral

Ruby (Corundum)

Aluminum Oxide (Al2O3) with Chromium traces

Diamond (or Cubic Zirconia) (Carbon (C) or Zirconium Dioxide (ZrO2)) — mineral

Diamond (or Cubic Zirconia)

Carbon (C) or Zirconium Dioxide (ZrO2)

Sandstone (Pebble/Conglomerate fragment) (Sandstone (clastic sedimentary rock)) — Sedimentary Rock

Sandstone (Pebble/Conglomerate fragment)

Sandstone (clastic sedimentary rock)

Sedimentary Rock

Granite (Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).) — igneous

Granite

Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).

Dyed Quartz (imitating Emerald/Green Quartz) (Silicon Dioxide (SiO2) with artificial pigment) — mineral

Dyed Quartz (imitating Emerald/Green Quartz)

Silicon Dioxide (SiO2) with artificial pigment

Obsidian (Obsidian (principally SiO2 - Silicon Dioxide)) — igneous

Obsidian

Obsidian (principally SiO2 - Silicon Dioxide)

Sandstone (Sandstone (arenite is a more specific geological term for a clean sandstone, while wacke refers to a dirty sandstone with significant matrix)) — Sedimentary

Sandstone

Sandstone (arenite is a more specific geological term for a clean sandstone, while wacke refers to a dirty sandstone with significant matrix)

Banded Chert / Flint (Silicon dioxide (SiO2)) — sedimentary

Banded Chert / Flint

Silicon dioxide (SiO2)

Amethyst and Citrine (Ametrine Mix) (Silicon Dioxide (SiO2) with Fe3+ impurities) — mineral

Amethyst and Citrine (Ametrine Mix)

Silicon Dioxide (SiO2) with Fe3+ impurities

Quartz (Engineered Stone Countertop) (Silicon Dioxide (SiO2) within a resin matrix) — igneous

Quartz (Engineered Stone Countertop)

Silicon Dioxide (SiO2) within a resin matrix