Rock Identifier

Category

Industrial By Product

Browse industrial by product specimens identified by the Rock Identifier community.

Learn about Industrial By Product in the encyclopedia

Adirondack Garnet

Adirondack Garnet

Brazilian Agate

Brazilian Agate

Almandine Garnet

Almandine Garnet

Tripolite

Diatomaceous Earth

Vanadium Tourmaline

Vanadium Tourmaline

Seam Agate

Cat's Eye Obsidian

Perthite

Orange Tourmaline

Orange Tourmaline

Pink Agate

Purple Agate

Polished dark river pebble (Indeterminate; likely basalt or fine-grained mafic rock) — igneous

Polished dark river pebble

Indeterminate; likely basalt or fine-grained mafic rock

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Hematite (Iron Oxide (Fe2O3)) — mineral

Hematite

Iron Oxide (Fe2O3)

Hematite (Iron Oxide (Fe2O3)) — mineral

Hematite

Iron Oxide (Fe2O3)

Limonite / Ironstone (FeO(OH)·nH2O) — sedimentary

Limonite / Ironstone

FeO(OH)·nH2O

Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2 (Chromium-rich Muscovite)) — mineral

Fuchsite

K(Al,Cr)2(AlSi3O10)(OH)2 (Chromium-rich Muscovite)

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Goethite (Goethite (FeO(OH))) — mineral

Goethite

Goethite (FeO(OH))

Chalcopyrite in Gossan (Chalcopyrite (CuFeS2) in a Limonite-rich Gossan matrix) — mineral

Chalcopyrite in Gossan

Chalcopyrite (CuFeS2) in a Limonite-rich Gossan matrix

Rounded, weathered stone (likely basaltic or andesitic river cobble) (Fine-grained mafic to intermediate volcanic rock; exact identification requires examination of a fresh surface) — igneous

Rounded, weathered stone (likely basaltic or andesitic river cobble)

Fine-grained mafic to intermediate volcanic rock; exact identification requires examination of a fresh surface

Specular Hematite (Specularite) (Iron Oxide (Fe2O3)) — mineral

Specular Hematite (Specularite)

Iron Oxide (Fe2O3)

Copper-Bearing Sulfide Ore (likely Chalcopyrite or Bornite) (Chalcopyrite (CuFeS2) or Bornite (Cu5FeS4) in host rock) — mineral

Copper-Bearing Sulfide Ore (likely Chalcopyrite or Bornite)

Chalcopyrite (CuFeS2) or Bornite (Cu5FeS4) in host rock

Epidote (Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))) — metamorphic

Epidote

Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Opalite (Synthetic Glass (Amorphized Silicon Dioxide)) — mineraloid

Opalite

Synthetic Glass (Amorphized Silicon Dioxide)

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Hematite Nodule (Iron oxide, Fe2O3) — mineral

Hematite Nodule

Iron oxide, Fe2O3

Botryoidal hematite–goethite specimen (Hematite (Fe₂O₃) with goethite (FeO(OH)), possibly minor manganese oxides) — mineral

Botryoidal hematite–goethite specimen

Hematite (Fe₂O₃) with goethite (FeO(OH)), possibly minor manganese oxides

Hematite (Hematite (Fe2O3)) — mineral

Hematite

Hematite (Fe2O3)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Red Quartzite (Quartzite (primarily SiO2 with hematite impurities)) — metamorphic

Red Quartzite

Quartzite (primarily SiO2 with hematite impurities)

Blue kyanite (Kyanite (Al₂SiO₅)) — mineral

Blue kyanite

Kyanite (Al₂SiO₅)

Polished garnet bead bracelet (Garnet group, likely almandine–pyrope solid solution; commonly approximated as Fe₃Al₂(SiO₄)₃–Mg₃Al₂(SiO₄)₃) — gemstone

Polished garnet bead bracelet

Garnet group, likely almandine–pyrope solid solution; commonly approximated as Fe₃Al₂(SiO₄)₃–Mg₃Al₂(SiO₄)₃

Rose Quartz (Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese) — Mineral

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Pumice (Pumice (volcanic glass)) — igneous

Pumice

Pumice (volcanic glass)

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

Quartz pebble

Quartz (Silicon Dioxide, SiO2)

Scoria (Vesicular Mafic Extrusive Igneous Rock) — igneous

Scoria

Vesicular Mafic Extrusive Igneous Rock

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Sandstone (Sedimentary Clastic Rock (Quartz Arenite)) — sedimentary

Sandstone

Sedimentary Clastic Rock (Quartz Arenite)

Pumice (Pumice (Vesicular volcanic glass)) — igneous

Pumice

Pumice (Vesicular volcanic glass)

Native Sulfur (Sulfur (S)) — mineral

Native Sulfur

Sulfur (S)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Tumbled mica-rich stone, likely muscovite schist (Muscovite-bearing quartz schist; chiefly muscovite mica, quartz, and possibly feldspar) — metamorphic

Tumbled mica-rich stone, likely muscovite schist

Muscovite-bearing quartz schist; chiefly muscovite mica, quartz, and possibly feldspar

Tiger’s eye (Quartz variety, primarily silicon dioxide (SiO₂); fibrous quartz pseudomorph after crocidolite asbestos) — gemstone

Tiger’s eye

Quartz variety, primarily silicon dioxide (SiO₂); fibrous quartz pseudomorph after crocidolite asbestos

Goethite (Goethite (FeO(OH))) — mineral

Goethite

Goethite (FeO(OH))

Turquoise color-bead and Hematite necklace (Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Hematite (Fe2O3)) — mineral

Turquoise color-bead and Hematite necklace

Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Hematite (Fe2O3)

Hematite with Magnetite (Iron Oxide (Fe2O3)) — mineral

Hematite with Magnetite

Iron Oxide (Fe2O3)

Quartzite (Quartzite (mostly SiO2)) — metamorphic

Quartzite

Quartzite (mostly SiO2)

Tumbled granite (likely granite or granitic gneiss) (Granite; chiefly quartz (SiO₂), feldspar, and mica, with possible alteration minerals) — igneous

Tumbled granite (likely granite or granitic gneiss)

Granite; chiefly quartz (SiO₂), feldspar, and mica, with possible alteration minerals

Stichtite (often found in Serpentinite) (Stichtite Mg6Cr2CO3(OH)16·4H2O) — Mineral

Stichtite (often found in Serpentinite)

Stichtite Mg6Cr2CO3(OH)16·4H2O

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)