Industrial By Product

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

Basalt with Peridotite Inclusion

Mafic Volcanic Rock (Extrusive Igneous) with Ultramafic Xenolith

igneous

Agate Geode

Chalcedony (SiO2 - Silicon Dioxide)

sedimentary (secondary mineral formation)

Green Jasper (Chert)

Silicon Dioxide (SiO2)

sedimentary

Apatite

Apatite group mineral (e.g., Fluorapatite - Ca5(PO4)3F, Chlorapatite - Ca5(PO4)3Cl, Hydroxylapatite - Ca5(PO4)3(OH))

mineral

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

metamorphic

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

Mineral

Basalt Arrowhead (worked stone)

Aphanitic mafic volcanic rock (Basalt)

igneous

Anthracite Coal

Anthracite (Carbon based)

metamorphic

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

mineral

Quartzite Pebble

Quartzite (primarily SiO2)

metamorphic

Anthracite Coal

Anthracite (Carbon-based organic sedimentary rock exposed to metamorphic heat/pressure; Chemical composition is approximately 86%–98% Carbon)

metamorphic

Diamond

Cubic Carbon (C)

mineral

Smoky Quartz

Silicon dioxide with aluminum impurities (SiO2)

mineral

Quartzite

Quartzite (SiO2 silicon dioxide)

metamorphic

Rough Garnet in Matrix

Almandine Garnet (Fe3Al2Si3O12)

mineral

White Howlite

Howlite (Calcium borosilicate hydroxide, Ca2B5SiO9(OH)5)

mineral

Unidentified Rock Fragment

Unknown

Rock

Chalcedony (Common Opal/Chert variety)

Silicon Dioxide (SiO2)

mineral

Quartz (Iron-Stained Quartz Pebble)

Silicon Dioxide (SiO2)

mineral

Green Fluorite

Calcium Fluoride (CaF2)

mineral

Diamond

Carbon (C)

Mineral

Pyrite

Pyrite (FeS2)

Mineral

Mica Group Minerals

There isn't a single scientific name as 'Mica' refers to a group of phyllosilicate minerals. Common scientific names include Muscovite (KAl₂ (AlSi₃O₁₀)(OH)₂), Biotite (K(Mg,Fe)₃AlSi₃O₁₀(OH)₂), Phlogopite (KMg₃AlSi₃O₁₀(OH)₂), and Lepidolite (K(Li,Al)₃(Al,Si,Rb)₄O₁₀(F,OH)₂).

Mineral