Rock Identifier

Category

Man Made Object (Coin)

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

Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

Pink Quartzite (Quartzite (primarily SiO2)) — metamorphic

Pink Quartzite

Quartzite (primarily SiO2)

White Marble (Tumbled) (Recrystallized Calcite (CaCO3)) — metamorphic

White Marble (Tumbled)

Recrystallized Calcite (CaCO3)

Diamond (C (Carbon)) — mineral

Diamond

C (Carbon)

Peridot (Olivine) (Olivine, (Mg, Fe)2SiO4) — mineral

Peridot (Olivine)

Olivine, (Mg, Fe)2SiO4

Diamond (or Diamond Simulant) (Carbon (C) - Native Element) — mineral

Diamond (or Diamond Simulant)

Carbon (C) - Native Element

Pearl (Organic Mineraloid (CaCO3 + Conchiolin)) — mineral

Pearl

Organic Mineraloid (CaCO3 + Conchiolin)

Olivine (Peridotite) ((Mg,Fe)2SiO4 (Magnesium Iron Silicate)) — igneous

Olivine (Peridotite)

(Mg,Fe)2SiO4 (Magnesium Iron Silicate)

Serpentine (Serpentine group ((Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4)) — metamorphic

Serpentine

Serpentine group ((Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4)

Pallasite Meteorite (Pallasite (ST-class)) — mineral

Pallasite Meteorite

Pallasite (ST-class)

Rose Quartz (Silicon dioxide (SiO2)) — mineral

Rose Quartz

Silicon dioxide (SiO2)

Pearl (Calcium Carbonate (Aragonite and Calcite), CaCO3) — mineral

Pearl

Calcium Carbonate (Aragonite and Calcite), CaCO3

Amethyst (Chevron or Banded Amethyst) (Silicon Dioxide (SiO2) with trace Iron (Fe)) — mineral

Amethyst (Chevron or Banded Amethyst)

Silicon Dioxide (SiO2) with trace Iron (Fe)

Rose Quartz (Silicon Dioxide (SiO2)) — mineral

Rose Quartz

Silicon Dioxide (SiO2)

Peridot (Olivine ((Mg, Fe)2SiO4)) — mineral

Peridot

Olivine ((Mg, Fe)2SiO4)

Serpentinite (Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)) — metamorphic

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)

Black Jasper (Jasper (Silicon Dioxide, SiO2)) — sedimentary

Black Jasper

Jasper (Silicon Dioxide, SiO2)

Rose Quartz (Silicon Dioxide (SiO2)) — mineral

Rose Quartz

Silicon Dioxide (SiO2)

Olivine (Peridotite) (Olivine Group; (Mg, Fe)2SiO4) — igneous

Olivine (Peridotite)

Olivine Group; (Mg, Fe)2SiO4

Olivine (Peridot) (Magnesium Iron Silicate (Mg, Fe)2SiO4) — mineral

Olivine (Peridot)

Magnesium Iron Silicate (Mg, Fe)2SiO4

Chert (and Chalcedony/Agate mixture) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (and Chalcedony/Agate mixture)

Microcrystalline Quartz (SiO2)

Agate (translucent pebble) (Silicon dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Agate (translucent pebble)

Silicon dioxide (SiO2) - Microcrystalline Quartz

Quartz (Quartz (SiO2 - Silicon Dioxide)) — Mineral, often found as detrital grains in sedimentary rocks

Quartz

Quartz (SiO2 - Silicon Dioxide)

Mineral, often found as detrital grains in sedimentary rocks

Hand-Drawn Trading Card (Amateur Artwork) (Cellulose-based substrate with wax/graphite/ink deposit (n/a for minerals)) — Organic/Synthetic Composite (Paper and Pigment)

Hand-Drawn Trading Card (Amateur Artwork)

Cellulose-based substrate with wax/graphite/ink deposit (n/a for minerals)

Organic/Synthetic Composite (Paper and Pigment)

Banded Gneiss (Gneiss (pronounced "nice")) — Metamorphic Rock

Banded Gneiss

Gneiss (pronounced "nice")

Metamorphic Rock

Pink Granite (Phaneritic plutonic rock (dominated by Alkali Feldspar)) — igneous

Pink Granite

Phaneritic plutonic rock (dominated by Alkali Feldspar)

Rose Quartz (Silicon Dioxide (SiO2)) — mineral

Rose Quartz

Silicon Dioxide (SiO2)

Peridot (Olivine) (Magnesium Iron Silicate (Mg,Fe)2SiO4) — mineral

Peridot (Olivine)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Pink Thulite (in Pumice-like texture) (Pink Zoisite (Mn-bearing Zoisite), Ca2Al3(SiO4)3(OH)) — metamorphic

Pink Thulite (in Pumice-like texture)

Pink Zoisite (Mn-bearing Zoisite), Ca2Al3(SiO4)3(OH)

Engineer Quartz/Quartzite (SiO2 (Silicon Dioxide with binders)) — Sedimentary or metamorphic-derived

Engineer Quartz/Quartzite

SiO2 (Silicon Dioxide with binders)

Sedimentary or metamorphic-derived

Rhodonite (Manganese Silicate (Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Rose Quartz (SiO2 (Silicon Dioxide)) — mineral

Rose Quartz

SiO2 (Silicon Dioxide)

Bixbyite on Rhyolite (Bixbyite (Mn2+,Fe3+)2O3) — mineral

Bixbyite on Rhyolite

Bixbyite (Mn2+,Fe3+)2O3

Sugilite (Sugilite (KNa2(Fe,Mn,Al)2Li3Si12O30)) — mineral

Sugilite

Sugilite (KNa2(Fe,Mn,Al)2Li3Si12O30)

Dendritic Opal (Dendritic Common Opal (SiO2·nH2O with Manganese oxide inclusions)) — mineral

Dendritic Opal

Dendritic Common Opal (SiO2·nH2O with Manganese oxide inclusions)

Rhodonite (Manganese Silicate (Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

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

Rose Quartz

Quartz (Silicon Dioxide, SiO2)

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)

Peridot (Olivine (Mg, Fe)2SiO4) — mineral

Peridot

Olivine (Mg, Fe)2SiO4

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

Yellow Diamond

Diamond (Carbon, C)

Zebra Jasper (usually a trade name for Serpentine or Basalt blend) (Antigorite/Chrysotile (Serpentine family) - Mg3Si2O5(OH)4) — metamorphic

Zebra Jasper (usually a trade name for Serpentine or Basalt blend)

Antigorite/Chrysotile (Serpentine family) - Mg3Si2O5(OH)4

Pearl (Calcium Carbonate (primarily Aragonite and Calcite), CaCO3) — mineral

Pearl

Calcium Carbonate (primarily Aragonite and Calcite), CaCO3