Rock Identifier

Category

Mineral (Tectosilicate)

Browse mineral (tectosilicate) specimens identified by the Rock Identifier community.

Learn about Mineral (Tectosilicate) in the encyclopedia

Glauconite

Hutcheonite

Halite

Sperrylite

Baddeleyite

Anatase

Brookite

Talc

Euxenite

Eltyubyuite

Buergerite

Dolomite

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Limonite (Ironstone) pseudomorph (Limonite (Hydrous ferric oxide), FeO(OH)·nH2O) — mineral

Limonite (Ironstone) pseudomorph

Limonite (Hydrous ferric oxide), FeO(OH)·nH2O

Agate / Chalcedony Geode (Silicon Dioxide (SiO2)) — sedimentary

Agate / Chalcedony Geode

Silicon Dioxide (SiO2)

Tiger's Eye (Silicon Dioxide (SiO2) with fibrous inclusions) — mineral

Tiger's Eye

Silicon Dioxide (SiO2) with fibrous inclusions

Green Fluorite (Calcium Fluoride (CaF2)) — mineral

Green Fluorite

Calcium Fluoride (CaF2)

Galena (Lead sulfide (PbS)) — mineral

Galena

Lead sulfide (PbS)

Diorite (Porphyritic) / Granite (Plutonic Igneous Rock (Granodiorite / Diorite)) — igneous

Diorite (Porphyritic) / Granite

Plutonic Igneous Rock (Granodiorite / Diorite)

Granite (Intrusive igneous rock) — igneous

Granite

Intrusive igneous rock

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

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Potassium Feldspar (Orthoclase / Microcline) (KAlSi3O8 (Potassium Aluminum Silicate)) — mineral

Potassium Feldspar (Orthoclase / Microcline)

KAlSi3O8 (Potassium Aluminum Silicate)

Quartz (Druzy or Chalcedony variant) (Silicon Dioxide (SiO2)) — mineral

Quartz (Druzy or Chalcedony variant)

Silicon Dioxide (SiO2)

River Stones (Quartzite and Sandstone) (Quartzite / Sedimentary Rock (SiO2 dominant)) — sedimentary

River Stones (Quartzite and Sandstone)

Quartzite / Sedimentary Rock (SiO2 dominant)

Tumbled aqua glassy mineral specimen, likely chrysocolla or turquoise imitation (Uncertain from image; possible chrysocolla (hydrated copper aluminosilicate, variable composition) or dyed/man-made glass) — mineral

Tumbled aqua glassy mineral specimen, likely chrysocolla or turquoise imitation

Uncertain from image; possible chrysocolla (hydrated copper aluminosilicate, variable composition) or dyed/man-made glass

Hematite (Iron Oxide (Fe2O3)) — mineral

Hematite

Iron Oxide (Fe2O3)

Quartz (Druzy / Crystalline) (Silicon Dioxide (SiO2)) — mineral

Quartz (Druzy / Crystalline)

Silicon Dioxide (SiO2)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Obsidian (Volcanic Glass (SiO2)) — igneous

Obsidian

Volcanic Glass (SiO2)

Snowflake Obsidian (Obsidian with Cristobalite inclusions (SiO2)) — igneous

Snowflake Obsidian

Obsidian with Cristobalite inclusions (SiO2)

Gneiss (River Cobble) (Gneiss) — metamorphic

Gneiss (River Cobble)

Gneiss

Limonite (Yellow Ochre) (Hydrated Iron Oxide (FeO(OH)·nH2O)) — mineral

Limonite (Yellow Ochre)

Hydrated Iron Oxide (FeO(OH)·nH2O)

Blue Apatite (Fluorapatite (Ca5(PO4)3F)) — mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Limonite and Goethite on Gossan (FeO(OH)·nH2O) — mineral

Limonite and Goethite on Gossan

FeO(OH)·nH2O

Limonite (Iron Ore) (Limonite (FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Malachite (Copper(II) carbonate hydroxide [Cu2CO3(OH)2]) — mineral

Malachite

Copper(II) carbonate hydroxide [Cu2CO3(OH)2]

Ironstone (Limonite/Hematite) (Ferruginous sedimentary rock (Fe2O3·nH2O / Fe2O3)) — sedimentary

Ironstone (Limonite/Hematite)

Ferruginous sedimentary rock (Fe2O3·nH2O / Fe2O3)

Yellow Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz

Silicon Dioxide (SiO2)

Chakra Crystal Bracelet (Mixed Mineral Assortment) — gemstone

Chakra Crystal Bracelet

Mixed Mineral Assortment

River Stone (likely Basalt or Greywacke) (Basalt with mineral veining) — igneous

River Stone (likely Basalt or Greywacke)

Basalt with mineral veining

Quartz-rich pegmatite with mica and dark inclusions (Pegmatite; chiefly quartz (SiO₂), with feldspar and biotite/tourmaline inclusions) — igneous

Quartz-rich pegmatite with mica and dark inclusions

Pegmatite; chiefly quartz (SiO₂), with feldspar and biotite/tourmaline inclusions

Likely weathered quartz-bearing rock fragment (Indeterminate; appears to contain quartz (SiO₂) with iron-oxide staining, possibly from quartzite, granite, or pegmatite) — mineral

Likely weathered quartz-bearing rock fragment

Indeterminate; appears to contain quartz (SiO₂) with iron-oxide staining, possibly from quartzite, granite, or pegmatite

Vesuvianite (Idocrase) (Ca19(Al, Mg, Fe)13(SiO4)10(Si2O7)4(OH, F, O)10) — mineral

Vesuvianite (Idocrase)

Ca19(Al, Mg, Fe)13(SiO4)10(Si2O7)4(OH, F, O)10

Bornite (Bornite (Cu5FeS4)) — mineral

Bornite

Bornite (Cu5FeS4)

Epidote with quartz/feldspar (Epidote, Ca2(Al,Fe)3(SiO4)3(OH)) — metamorphic

Epidote with quartz/feldspar

Epidote, Ca2(Al,Fe)3(SiO4)3(OH)

Limonite (Iron Ore/Bog Iron) (Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore/Bog Iron)

Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)

Limonite Boxwork / Iron Ore Concretion (FeO(OH)qnH2O (Hydrated iron oxide)) — sedimentary

Limonite Boxwork / Iron Ore Concretion

FeO(OH)qnH2O (Hydrated iron oxide)

Botryoidal Goethite (Goethite (α-Fe3+O(OH))) — mineral

Botryoidal Goethite

Goethite (α-Fe3+O(OH))

Blue Apatite (Fluorapatite (Ca5(PO4)3F)) — mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Blue Apatite (Apatite-(CaF), Ca5(PO4)3F (Calcium Fluorophosphate)) — mineral

Blue Apatite

Apatite-(CaF), Ca5(PO4)3F (Calcium Fluorophosphate)

Tumbled granite or granitic gneiss pebble (Granite/granitic gneiss, chiefly quartz, feldspar, and dark biotite or amphibole) — igneous

Tumbled granite or granitic gneiss pebble

Granite/granitic gneiss, chiefly quartz, feldspar, and dark biotite or amphibole

Shark Tooth Fossil (Otodus obliquus (or similar prehistoric lamniform shark tooth)) — fossil

Shark Tooth Fossil

Otodus obliquus (or similar prehistoric lamniform shark tooth)