Quartz
Silicon Dioxide (SiO2)
Category
Browse sedimentary or igneous associated mineral specimens identified by the Rock Identifier community.
Quartz
Silicon Dioxide (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Hematite
Hematite (Α-Fe2O3)
Chalcedony (Agate/Quartz)
Silicon Dioxide (SiO2)
Quartz Fragment
Silicon Dioxide (SiO2)
Quartz
Silicon dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Banded Chert (Jasper)
Silicon Dioxide (SiO2) with iron oxide inclusions
Glauconitic Sandstone
Glauconitic Sandstane (containing K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2)
Serpentinite
Serpentinite (composed primarily of serpentine-group minerals like antigorite, chrysotile, and lizardite; chemical formula varies but generally Mg3Si2O5(OH)4)
Gold Nugget
Gold (Au)
Native Gold Flake
Gold (Au)
Gold
Native Gold (Au)
Black Tourmaline
Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)
Crazy Lace Agate
Chalcedony (SiO2)
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Bloodstone
Chalcedony (Quartz)
Actinolite
Ca2(Mg,Fe)5Si8O22(OH)2
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Unakite
Epidotized Granite
Dark Igneous Rock (Likely Basalt or Diabase)
Basalt (extrusive igneous rock) or Diabase (intrusive igneous rock - also known as Dolerite), largely composed of plagioclase feldspar, pyroxene (augite), and sometimes olivine and amphibole. Exact mineralogy would require thin section analysis.
Epidote-bearing Rock / Epidote Inclusion
Epidote (Ca2(Al, Fe)3(SiO4)3(OH)) in host rock
Agate
Silicon Dioxide (Chalcedony), SiO2
Raw Quartz
Silicon Dioxide (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Granite Gneiss
Gneiss (containing quartz, alkali feldspar, plagioclase, biotite/amphibole)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Chrysocolla on Limonite Matrix
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla) on FeO(OH)·nH2O (Limonite)
Quartz (Milky/Crystalline variety)
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Talc (Soapstone variety)
Talc (Hydrated magnesium silicate) - Mg3Si4O10(OH)2
Rutilated Quartz
Quartz with Rutile inclusions (SiO2 with TiO2 inclusions)
Black Tourmaline
Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)
Clear Quartz
Silicon Dioxide (SiO2)
Lapis Lazuli
Lapis Lazuli (Rock containing lazurite, calcite, and pyrite)
Quartz (Milk or Clear Variety)
Silicon Dioxide (SiO2)