Chert (Chalk-associated Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Category
Sedimentary Or Igneous Associated Mineral
Browse sedimentary or igneous associated mineral specimens identified by the Rock Identifier community.
Opal
Hydrated Amorphous Silica (SiO2·nH2O)
Mineral
Epidote with Magnetite/Hematite inclusions
Epidote (Ca2(Al2,Fe3+)(SiO4)3(OH)) with Iron Oxides
mineral
Sand Grain (Silica/Quartz Grain)
Silicon Dioxide (SiO2)
sedimentary
Pyrite
Iron Disulfide (FeS2)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Chrysocolla on Matrix
Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Carnelian
Carnelian (SiO2 with Iron Oxide impurities)
mineral
Red Jasper (possibly)
Jasper (a variety of Chalcedony, SiO2)
Mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Basalt
Basalt (extrusive igneous rock)
Igneous
Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite (often referred to casually as 'Fluorspar' in industrial contexts)
Fluorite (CaF2)
Mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Quartz
Quartz (SiO2)
Mineral
Banded Agate (Agatized Geode Slice)
Silicon Dioxide (SiO₂)
mineral
Rainbow Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Red Hematite
Iron(III) Oxide (Fe2O3)
mineral
Quartz (Milky/Bull Quartz)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Druzy)
Crystalline Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Clear Quartz Cluster
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Yellow Chalcedony (likely carnelian or yellow agate)
Silicon Dioxide (SiO₂)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Magnetite (Lodestone variety)
Magnetite (Iron(II,III) oxide, Fe3O4)
mineral
Pyrite on Quartz
Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)
mineral
Gneiss (specifically Granitic Gneiss)
Gneiss (composed primarily of Quartz, Feldspar, and Biotite/Amphibole)
metamorphic
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic