Sandstone with Ironstone Concretion
Arenite with Ferruginous Cement
sedimentary
Category
Mineral (Silicate Variety)
Browse mineral (silicate variety) specimens identified by the Rock Identifier community.
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Slag (Industrial Byproduct)
Ferrous/Non-ferrous Silicate
igneous (artificial/anthropogenic)
Howlite (tumbled stone)
Howlite, Ca₂B₅SiO₉(OH)₅
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Howlite
Howlite (Ca2B5SiO9(OH)5)
mineral
Tumbled banded iron formation (jasper-rich ironstone)
Banded iron formation, commonly hematite/magnetite with microcrystalline quartz (SiO₂)
sedimentary
Porphyritic Basalt
Porphyritic Basalt (Silicate Rock)
igneous
![Kaolin (China Clay) (Kaolinite [Al2Si2O5(OH)4]) — sedimentary](https://media.rock.id/kaolin-china-clay-2ca1699d-eb93-45f9-afe0-bc6ad740effa-thumbnail.jpg)
Kaolin (China Clay)
Kaolinite [Al2Si2O5(OH)4]
sedimentary
Greenschist / Chloritaform Schist
Chlorite Schist (Group of Silicate Minerals)
metamorphic
Gold-bearing Quartz Ore
Auriferous Quartz (SiO2 + Au)
metamorphic
Rose Quartz Sphere
Silicon Dioxide (SiO2)
mineral
Greenish translucent mineral fragment
Indeterminate; possibly serpentine, epidote, or green glassy feldspar
mineral
Lepidolite and Rubellite (Pink Tourmaline) in Quartz
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lepidolite) and Na(Li,Al)3Al6(BO3)3Si6O18(OH)4 (Elbaite/Pink Tourmaline)
mineral
Green Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Blue Quartz (Aventurine)
Silicon Dioxide (SiO2) with inclusions of Dumortierite or Magnesio-riebeckite
mineral
Tumbled quartz-bearing rock, possibly garnet-bearing quartzite
Quartz-dominant silicate rock; visible minerals may include quartz, iron oxides, and dark mica or amphibole
metamorphic
Beryl (likely Aquamarine or Heliodor variant)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Aquamarine
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Zircon
Zircon (Zirconium Silicate, ZrSiO4)
mineral
Zircon
Zircon (Zirconium Silicate - ZrSiO4)
mineral
Aquamarine
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Aquamarine
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Peach Moonstone
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Moonstone (specifically White Moonstone or Girasol Quartz)
Potassium aluminum silicate (KAlSi3O8)
mineral
Beryl (Emerald or Aquamarine in Matrix)
Beryllium Aluminum Silicate (Be3Al2Si6O18)
mineral
Aquamarine (Beryl)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Amazonite
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Pyrope Garnet
Magnesium aluminum silicate (Mg3Al2Si3O12)
mineral
Feldspar (Orthoclase/Potassium Feldspar)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Moonstone (Adularia)
Potassium aluminum silicate (KAlSi3O8)
mineral
White Moonstone (Feldspar)
Potassium aluminum silicate (KAlSi3O8)
mineral
Amazonite
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Feldspar (Orthoclase)
Potassium Alveolar Silicate (KAlSi3O8)
mineral
Green Opal / Common Opal
Hydrated Silicon Dioxide (SiO2·nH2O)
mineral
Brecciated Chert
Sedimentary Chert (SiO2) with Calc-Silicate mineralization
sedimentary
Tumbled green serpentine (probable)
Serpentine-group minerals, chiefly antigorite and lizardite; hydrated magnesium silicate, approximately Mg₃Si₂O₅(OH)₄
mineral
Picture Jasper
Silicon Dioxide (SiO2) with iron oxide and clay inclusions
sedimentary
Schist
Metamorphic Rock (Schist)
metamorphic
Sandstone
Arenite
sedimentary
Chrysocolla
Chrysocolla; (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Chrysocolla
Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)
mineral
Unidentified small mineral fragments
Likely quartz- or feldspar-rich material; species cannot be determined reliably from the image
mineral