Rock Identifier

Category

Man Made Object (Ring)

Browse man made object (ring) specimens identified by the Rock Identifier community.

Learn about Man Made Object (Ring) in the encyclopedia

Opalite

Eye Agate

Map Jasper

Goldstone

Blue Goldstone

Mandarin Garnet

Mandarin Garnet

Andalusite

Zincite

Bird's Eye Jasper

Phonolite

Marl

Cipollino Marble

Cipollino Marble

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Tumbled Agate (Silicon dioxide (SiO2)) — sedimentary

Tumbled Agate

Silicon dioxide (SiO2)

Carnelian (Carnelian (Cryptocrystalline Quartz, SiO2)) — mineral

Carnelian

Carnelian (Cryptocrystalline Quartz, SiO2)

Red Garnet (Pyrope-Almandine series (Mg3Al2(SiO4)3 to Fe3Al2(SiO4)3)) — mineral

Red Garnet

Pyrope-Almandine series (Mg3Al2(SiO4)3 to Fe3Al2(SiO4)3)

Hematitic Sandstone (Sandstone with Iron Oxide (Hematite) staining) — sedimentary

Hematitic Sandstone

Sandstone with Iron Oxide (Hematite) staining

Carnelian (Chalcedony (SiO₂)) — mineral

Carnelian

Chalcedony (SiO₂)

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

Jasper

Silicon dioxide (SiO2) with impurities

Red Sandstone (Arenite (Ferruginous Sandstone)) — sedimentary

Red Sandstone

Arenite (Ferruginous Sandstone)

Iron-stained quartz-rich rock, possibly jasper or chert (Microcrystalline quartz (SiO₂) with iron oxides/hydroxides) — mineral

Iron-stained quartz-rich rock, possibly jasper or chert

Microcrystalline quartz (SiO₂) with iron oxides/hydroxides

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

Snowflake Obsidian

Volcanic glass with Cristobalite inclusions (70–75% SiO2)

Polished banded agate (likely Botswana agate) (Microcrystalline quartz, SiO₂ (chalcedony with iron-oxide and other mineral bands)) — mineral

Polished banded agate (likely Botswana agate)

Microcrystalline quartz, SiO₂ (chalcedony with iron-oxide and other mineral bands)

Pearl (Calcium carbonate (CaCO3) + organic conchiolin) — gemstone

Pearl

Calcium carbonate (CaCO3) + organic conchiolin

Seashell Fragment (Calcium Carbonate (CaCO3) in the form of Aragonite or Calcite) — mineral

Seashell Fragment

Calcium Carbonate (CaCO3) in the form of Aragonite or Calcite

Bivalve Fossil (Clam) (Class Bivalvia, likely Mercenaria or similar genus) — fossil

Bivalve Fossil (Clam)

Class Bivalvia, likely Mercenaria or similar genus

Petrified Wood (Silicified Wood (SiO2)) — mineral

Petrified Wood

Silicified Wood (SiO2)

Banded Agate (Chalcedony (SiO2) with microcrystalline quartz) — mineral

Banded Agate

Chalcedony (SiO2) with microcrystalline quartz

Chert Nodule (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Nodule

Microcrystalline Quartz (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Crinoid Fossil in Limestone (Crinoidea fossil (stalk segments) in Calcium Carbonate (CaCO3) matrix) — sedimentary

Crinoid Fossil in Limestone

Crinoidea fossil (stalk segments) in Calcium Carbonate (CaCO3) matrix

Sandstone (Quartzose) (Arenite (Siliciclastic sedimentary rock)) — sedimentary

Sandstone (Quartzose)

Arenite (Siliciclastic sedimentary rock)

Coquina (Biogenic Limestone (Calcite, CaCO3)) — sedimentary

Coquina

Biogenic Limestone (Calcite, CaCO3)

Coquina (Biogenic Limestone (Coquina)) — sedimentary

Coquina

Biogenic Limestone (Coquina)

Coquina (Bioclastic Limestone) — sedimentary

Coquina

Bioclastic Limestone

Unakite (Altered Granite (Epidotized Granite)) — metamorphic

Unakite

Altered Granite (Epidotized Granite)

Carnelian (Silicon dioxide (SiO2)) — mineral

Carnelian

Silicon dioxide (SiO2)

Basalt (Basalt) — igneous

Basalt

Basalt

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

Granite

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

Granite (Phaneritic Felsic Igneous Rock) — igneous

Granite

Phaneritic Felsic Igneous Rock

Granite (Granite (a phaneritic intrusive igneous rock)) — igneous

Granite

Granite (a phaneritic intrusive igneous rock)

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Sandstone (Arenite (SiO2 composition dominant)) — sedimentary

Sandstone

Arenite (SiO2 composition dominant)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Sandstone (Ferruginous) (Arenite with Iron Oxide cement (primarily SiO2 with Fe2O3)) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron Oxide cement (primarily SiO2 with Fe2O3)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Sandstone (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone

Arenite (composed primarily of SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Chalcedony (Silicon Dioxide (SiO2)) — mineral

Chalcedony

Silicon Dioxide (SiO2)

Chert (Flint Nodules) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Flint Nodules)

Cryptocrystalline Quartz (SiO2)

Sandstone (Pet Rock) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (Pet Rock)

Clastic sedimentary rock (primarily SiO2)

Chert (often called Flint) (Chert (SiO2)) — sedimentary

Chert (often called Flint)

Chert (SiO2)

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

Chert / Flint

Silicon Dioxide (SiO2)