Slag Glass
Anthropogenic Amorphous Silicon Dioxide
mineral
Category
Mineral Like Biological Tissue
Browse mineral like biological tissue specimens identified by the Rock Identifier community.
Hypersthene
(Mg,Fe)SiO3 - Enstatite-Ferrosilite series
mineral
Quartz Vein with Iron Staining
Silicon Dioxide (SiO2) with limonite/hematite staining
mineral
Druzy Quartz on Milky Quartz
Silicon Dioxide (SiO2)
mineral
Schist (Diamond Drill Core)
Mica Schist
metamorphic
Desert Rose
Gypsum or Barite (CaSO4·2H2O or BaSO4)
mineral
Basalt with Epidote/Chlorite
Amygdaloidal Basalt (SiO2 with (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)))
igneous
Schist
Mica Schist (contains muscovite/biotite and quartz)
metamorphic
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(F,OH)2)
mineral
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
sedimentary
Mica Schist with Iron Staining
Mica Schist
metamorphic
Greisen
Greisen
Metamorphic
Vesicular Basalt (Lava Rock)
Aphanitic Mafic Igneous Rock
igneous
Concrete with Aggregate
Composite construction material; primary matrix is Calcium Silicate Hydrate (C-S-H)
anthropogenic (human-made) sedimentary-like material
Fluorite
Calcium Fluoride (CaF2)
mineral
Mixed collection of Quartz varieties, Chalcedony, and metamorphic pebbles
Mixed gemstones (primarily Silicon Dioxide - SiO2)
mineral
Dendritic Agate (Tumbled)
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
![Turquoise with Pyrite (Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O] with Iron Pyrite (FeS2)) — mineral](https://media.rockidentification.com/157e6415-0364-437c-b0a4-74ad43800d08-thumbnail.jpg)
Turquoise with Pyrite
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O] with Iron Pyrite (FeS2)
mineral
Sandstone
Clastic Sedimentary Rock (composed primarily of Quartz: SiO2)
sedimentary
Red Sandstone
Clastic sedimentary rock (primarily SiO2 with Fe2O3 iron oxide staining)
sedimentary
Biotite or Phlogopite Mica
K(Mg,Fe)3(AlSi3O10)(F,OH)2
mineral
Dyed Quartz (often sold as 'Blue Quartz' or 'Blue Agate')
Silicon Dioxide (SiO2) with artificial pigment
mineral
Ferruginous Sandstone (Gritstone)
Arenite with Iron-Oxide Cement (SiO2 with Fe2O3 and FeO(OH))
sedimentary
Turquoise
Turquoise - CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)
mineral
Watermelon Tourmaline in Quartz Matrix
Elbaite (complex Borosilicate) - Na(Li,Al)3Al6(BO3)3Si6O18(OH)4
mineral
Iron-stained Quartz
Silicon Dioxide (SiO2) with Limonite/Hematite inclusions
mineral
Granite
Granite (Felsic Plutonic Rock)
Igneous
Sandstone
Arenite (primarily composed of SiO2)
sedimentary
Red Sandstone
Clastic Terrigenous Sedimentary Rock (composed mostly of SiO2 with Fe2O3)
sedimentary
Red Sandstone
Arenite (predominantly Quartz with Hematite cementation)
sedimentary
Mica Schist
Mica Schist (primarily Muscovite and Quartz)
metamorphic
Obsidian
Obsidian (Volcanic Glass)
igneous
Limonite (Iron Ore/Sandstone mixture)
Limonite (FeO(OH)·nH2O) often mixed with Goethite and sedimentary matrix
mineral
Brown Sandstone
Arenite (primarily Quartz and Feldspar, with Iron Oxide cement)
sedimentary
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Vesicular Basalt with Secondary Mineral Inclusions
Aphanitic Mafic Igneous Rock (primarily Plagioclase and Pyroxene)
igneous
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Green Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Native Copper
Native Copper (Cu)
mineral
Granite / Gneiss Complex
Felsic Plutonic Rock (Granite) or High-grade Metamorphic Rock (Gneiss)
igneous/metamorphic
Obsidian
Obsidian (Amorphous volcanic glass, predominantly SiO2)
igneous