Rock Identifier

Category

Synthetic Polymer (Synthetic Material)

Browse synthetic polymer (synthetic material) specimens identified by the Rock Identifier community.

Learn about Synthetic Polymer (Synthetic Material) in the encyclopedia

Yttrium Aluminum Garnet

Yttrium Aluminum Garnet

Zincite

Opalite

Lead Feldspar

Peat

Zircon

Dunite

Limonite

Shell Opal

Madagascar Opal

Lavender Obsidian

Electric Blue Obsidian

Weathered volcanic rock, likely andesite or basalt (Fine-grained mafic to intermediate volcanic rock; probable andesite–basalt, compositionally dominated by plagioclase with pyroxene and possibly alteration minerals) — igneous

Weathered volcanic rock, likely andesite or basalt

Fine-grained mafic to intermediate volcanic rock; probable andesite–basalt, compositionally dominated by plagioclase with pyroxene and possibly alteration minerals

Banded Gneiss (Gneiss) — metamorphic

Banded Gneiss

Gneiss

Leopard Skin Jasper (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Leopard Skin Jasper

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Diamond (Native Carbon (C)) — gemstone

Diamond

Native Carbon (C)

Quartz geode / iron-stained quartz vein rock (Quartz (SiO₂), likely with iron oxides and minor feldspar or host-rock minerals) — mineral

Quartz geode / iron-stained quartz vein rock

Quartz (SiO₂), likely with iron oxides and minor feldspar or host-rock minerals

Greenstone / altered basalt fragment (Likely chlorite–epidote–actinolite altered basalt; exact identification requires testing) — igneous

Greenstone / altered basalt fragment

Likely chlorite–epidote–actinolite altered basalt; exact identification requires testing

Rounded brown pebble, likely chert or iron-stained quartzite (Chert (microcrystalline quartz, SiO₂) or quartzite (recrystallized quartz, SiO₂)) — sedimentary

Rounded brown pebble, likely chert or iron-stained quartzite

Chert (microcrystalline quartz, SiO₂) or quartzite (recrystallized quartz, SiO₂)

Granite (Phaneritic Igneous Rock) — igneous

Granite

Phaneritic Igneous Rock

Yellow Jade (Quartzite Jade) (Quartzite (SiO2)) — gemstone

Yellow Jade (Quartzite Jade)

Quartzite (SiO2)

Diamond and Sapphire (Carbon (Diamond, C) and Aluminum Oxide (Sapphire, Al2O3)) — gemstone

Diamond and Sapphire

Carbon (Diamond, C) and Aluminum Oxide (Sapphire, Al2O3)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (Flint Nodules) (Silicon dioxide (SiO2)) — sedimentary

Chert (Flint Nodules)

Silicon dioxide (SiO2)

Coquina (Biogenic calcarenite / Coquina (CaCO3)) — sedimentary

Coquina

Biogenic calcarenite / Coquina (CaCO3)

Chert Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Pebble

Microcrystalline Quartz (SiO2)

Sandstone (Arenite (SiO2 principal)) — sedimentary

Sandstone

Arenite (SiO2 principal)

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

Chert / Flint

Silicon dioxide (SiO2)

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

Chert (River Pebble)

Microcrystalline Quartz (SiO2)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Felsic Tuff (Pyroclastic volcanic rock (Tuff)) — igneous

Felsic Tuff

Pyroclastic volcanic rock (Tuff)

Tektite (Indochinite) (Tektite (High-silica natural glass)) — mineralogical glass/meteorite impactite

Tektite (Indochinite)

Tektite (High-silica natural glass)

mineralogical glass/meteorite impactite

Chert (Brown Flint) (Cryptocrystalline or Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Brown Flint)

Cryptocrystalline or Microcrystalline Quartz (SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Chert (Jasper/Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Flint)

Microcrystalline Quartz (SiO2)

Concrete Fragment (Hardened Portland Cement Composite) — Anthropogenic (Man-made material mimicking sedimentary rock)

Concrete Fragment

Hardened Portland Cement Composite

Anthropogenic (Man-made material mimicking sedimentary rock)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper)

Silicon Dioxide (SiO2)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Chert (Flint) (Chert (SiO2)) — sedimentary

Chert (Flint)

Chert (SiO2)

Chert (with Iron Staining) (Chert (SiO2)) — sedimentary

Chert (with Iron Staining)

Chert (SiO2)

Chert (often called Flint or River Pebble) (Chert (Microcrystalline Quartz, SiO2)) — sedimentary

Chert (often called Flint or River Pebble)

Chert (Microcrystalline Quartz, SiO2)

Amber (Succinite (C10H16O)) — mineral

Amber

Succinite (C10H16O)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Chert (River Stone) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (River Stone)

Microcrystalline Quartz (SiO2)

Gray Granite (Granite (Phaneritic igneous rock)) — igneous

Gray Granite

Granite (Phaneritic igneous rock)

Chert (variations include Flint/Jasper) (Chert (SiO2)) — sedimentary

Chert (variations include Flint/Jasper)

Chert (SiO2)

Chert (Flint) (Chert (Microcrystalline Silicon Dioxide, SiO2)) — sedimentary

Chert (Flint)

Chert (Microcrystalline Silicon Dioxide, SiO2)

Chert (Yellow Jasper/Quartzite Pebble) (Microcrystalline Silicon Dioxide (SiO2)) — sedimentary

Chert (Yellow Jasper/Quartzite Pebble)

Microcrystalline Silicon Dioxide (SiO2)

Granite (Dioritic variant) (Granite (Phaneritic Igneous Rock)) — igneous

Granite (Dioritic variant)

Granite (Phaneritic Igneous Rock)

Nephrite Jade (Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2)) — metamorphic

Nephrite Jade

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2)

Chert (Flint Nodule) (Microcrystalline or cryptocrystalline quartz (SiO2)) — sedimentary

Chert (Flint Nodule)

Microcrystalline or cryptocrystalline quartz (SiO2)