Rock Identifier

Category

Synthetic (Not A Natural Rock)

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

Learn about Synthetic (Not A Natural Rock) in the encyclopedia

Asphalt Rock

Yttrium Aluminum Garnet

Yttrium Aluminum Garnet

Chalk

Zircon

Obsidian

Kimberlite

Emerald in Matrix

Emerald in Matrix

Tripolite

Guano

Halite

Aquamarine Matrix

Aquamarine Matrix

Rock Salt

Tumbled jasper or quartzite pebble (Jasper (microcrystalline quartz, SiO₂), possibly iron-stained quartzite) — metamorphic

Tumbled jasper or quartzite pebble

Jasper (microcrystalline quartz, SiO₂), possibly iron-stained quartzite

Green Aventurine (Silicon Dioxide (SiO2) with Fuchsite inclusions) — metamorphic

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Man-made Dyed Aura Quartz (Silicon Dioxide (SiO2) with metallic coating/dye) — mineral

Man-made Dyed Aura Quartz

Silicon Dioxide (SiO2) with metallic coating/dye

$Orange Crackle Quartz (Silicon Dioxide (SiO2) with thermal fracturing) — mineral$

Orange Crackle Quartz

Silicon Dioxide (SiO2) with thermal fracturing

Diamond (Diamond (Pure Carbon, C)) — mineral

Diamond

Diamond (Pure Carbon, C)

Quartz Geode (Silicon Dioxide (SiO2) within a geode) — mineral

Quartz Geode

Silicon Dioxide (SiO2) within a geode

Black Chert (Flint) (Silicon Dioxide (SiO2)) — sedimentary

Black Chert (Flint)

Silicon Dioxide (SiO2)

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

Quartz (Smoky Quartz variant)

Silicon Dioxide (SiO2)

Milky quartz (Quartz (silicon dioxide, SiO₂)) — mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)

Aura Quartz (Cranberry or Magenta Aura Quartz) (Silicon dioxide coated with titanium/niobium (SiO2)) — mineral

Aura Quartz (Cranberry or Magenta Aura Quartz)

Silicon dioxide coated with titanium/niobium (SiO2)

Obsidian (Volcanic Glass (Amorphous silicon dioxide with trace impurities)) — igneous

Obsidian

Volcanic Glass (Amorphous silicon dioxide with trace impurities)

Blue Howlite (Dyed Howlite (Ca2B5SiO9(OH)5)) — mineral

Blue Howlite

Dyed Howlite (Ca2B5SiO9(OH)5)

Tumbled white quartz pebble (Quartz (silicon dioxide, SiO₂), likely milky quartz) — mineral

Tumbled white quartz pebble

Quartz (silicon dioxide, SiO₂), likely milky quartz

Tumbled brown quartz/chert pebble (Microcrystalline quartz (SiO₂), possibly chert or jasper) — mineral

Tumbled brown quartz/chert pebble

Microcrystalline quartz (SiO₂), possibly chert or jasper

Tumbled rose quartz (Quartz, silicon dioxide (SiO₂), pink variety) — mineral

Tumbled rose quartz

Quartz, silicon dioxide (SiO₂), pink variety

Pearl (Biogenic Mineraloid) (Calcium carbonate (CaCO3) primarily as Aragonite) — mineral

Pearl (Biogenic Mineraloid)

Calcium carbonate (CaCO3) primarily as Aragonite

Banded Chert (Jasper) River Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert (Jasper) River Pebble

Microcrystalline Quartz (SiO2)

Chert (specifically Silex or Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Silex or Flint)

Microcrystalline Quartz (SiO2)

Quartz Sand (Beach Sand) (Silicon Dioxide (SiO2)) — sedimentary

Quartz Sand (Beach Sand)

Silicon Dioxide (SiO2)

Green Aventurine (Aventurine Quartz (SiO2 with Fuchsite inclusions)) — metamorphic

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Polished tiger iron (Tiger iron; interlayered hematite, jasper, and crocidolite-quartz (often riebeckite)) — metamorphic

Polished tiger iron

Tiger iron; interlayered hematite, jasper, and crocidolite-quartz (often riebeckite)

Chalcopyrite (Peacock Ore) (Copper Iron Sulfide (CuFeS2)) — mineral

Chalcopyrite (Peacock Ore)

Copper Iron Sulfide (CuFeS2)

Emerald in Quartz Matrix (Beryl (Be3Al2Si6O18) with trace Chromium/Vanadium) — gemstone

Emerald in Quartz Matrix

Beryl (Be3Al2Si6O18) with trace Chromium/Vanadium

Pearl (Calcium Carbonate (CaCO3) - mainly Aragonite and Calcite) — mineral

Pearl

Calcium Carbonate (CaCO3) - mainly Aragonite and Calcite

River Stone (Quartzite/Siltstone) (Quartzite (primarily SiO2)) — metamorphic

River Stone (Quartzite/Siltstone)

Quartzite (primarily SiO2)

Quartz (likely heat-treated or colored cord) (Silicon Dioxide (SiO2)) — mineral

Quartz (likely heat-treated or colored cord)

Silicon Dioxide (SiO2)

Magnetite (Iron(II,III) oxide (Fe3O4)) — mineral

Magnetite

Iron(II,III) oxide (Fe3O4)

Diamond (in jewelry setting) (Diamond (C - Pure Carbon)) — mineral

Diamond (in jewelry setting)

Diamond (C - Pure Carbon)

Smoky Quartz with Feldspar (Quartz (SiO2) with Potassium Feldspar (KAlSi3O8)) — mineral

Smoky Quartz with Feldspar

Quartz (SiO2) with Potassium Feldspar (KAlSi3O8)

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

Amethyst (Tumbled Quarz)

Silicon Dioxide (SiO2) with iron impurities

Red Jasper (Silicon dioxide (SiO2) with iron oxide inclusions) — sedimentary

Red Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Chert (Flint Nodule) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Flint Nodule)

Silicon Dioxide (SiO2)

Dead Sea Salt Crust (Halite (NaCl)) — sedimentary

Dead Sea Salt Crust

Halite (NaCl)

Pink Quartzite (Metamorphosed Quartz Arenite (SiO2)) — metamorphic

Pink Quartzite

Metamorphosed Quartz Arenite (SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Tumbled Chalcedony Pebble (Silicon Dioxide (SiO2)) — mineral

Tumbled Chalcedony Pebble

Silicon Dioxide (SiO2)

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

Yellow Quartz (Citrine Quartz / Milky Quartz)

Silicon Dioxide (SiO2)

Tumbled purple quartzite (Quartzite; predominantly crystalline SiO₂ with minor iron-oxide or other mineral impurities) — metamorphic

Tumbled purple quartzite

Quartzite; predominantly crystalline SiO₂ with minor iron-oxide or other mineral impurities

Citrine (Heat-Treated Amethyst) (Quartz (SiO2)) — mineral

Citrine (Heat-Treated Amethyst)

Quartz (SiO2)

Citrine (Silicon dioxide (SiO2)) — mineral

Citrine

Silicon dioxide (SiO2)

Tumbled quartz pebble (Quartz (SiO₂), likely milky or iron-stained quartz) — mineral

Tumbled quartz pebble

Quartz (SiO₂), likely milky or iron-stained quartz