Quartz with Iron Stains
Quartz (SiO2) with iron oxide/hydroxide staining
Mineral
Category
Sedimentary (Processed Mineral Product)
Browse sedimentary (processed mineral product) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Processed Mineral Product) in the encyclopedia
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Sandstone
Sandstone (lithified arenite/wacke)
Sedimentary Rock
Quartz (River Pebble)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Silicon Carbide (Carborundum)
Silicon Carbide (SiC)
mineral
Shale or Slate with Quartz Veins
Shale (fine-grained clastic sedimentary rock) or Slate (low-grade metamorphic rock formed from shale) with Quartz (SiO2) veins
Metamorphic, likely Sedimentary with Quartz veins
Brown Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Gold
Gold (Au)
mineral
Assorted Decorative Tumbled Stones (Quartz, Sodalite, Aventurine, Calcite)
Mixed Silicates and Carbonates (SiO2, Na8(Al6Si6O24)Cl2, CaCO3)
mineral
Quartzite Pebble
Quartzite (SiO2 based)
metamorphic
Tiger's Eye
Pseudomorph of Quartz (SiO2) after Crocidolite
mineral
Quartz
Quartz (SiO2)
Mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz (likely tumbled or naturally water-worn)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Biological Bone (Patella/Knee)
Patella (part of the Human Skeletal System)
Organic Structure (Not a Rock)
Epidote in Quartz
Quartz with Epidote inclusions (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH) inclusions)
Mineral
Chert (Arrowhead variety)
Chert (SiO2)
sedimentary
Staghorn Coral Specimen
Acropora cervicornis (Calcium Carbonate, CaCO3)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Jasper
Silicon dioxide (SiO2) with impurities
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Fossil Shell (Bivalve)
Phylum Mollusca, Class Bivalvia (typically composed of Calcium Carbonate / CaCO3)
sedimentary
Sea Glass (Frosted Glass)
Amorphous Silica (SiO2) with various metal oxide impurities
Man-made material (Anthro-lithic product)
River Cobble (likely Sandstone or Siltstone type)
Sandstone or Siltstone (common rock types that form river cobbles)
Sedimentary Rock (specifically a clastic sedimentary rock formed into a cobble)
Ferruginous Quartz on Ironstone
Silicon Dioxide (SiO2) with Hematite (Fe2O3)
metamorphic
Pyrite
Pyrite (Iron sulfide, FeS₂)
Mineral
Tiger's Eye
Fibrous Quartz (SiO2) with iron inclusions
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Red Jasper with Quartz and Hematite
Silicon Dioxide (SiO2) with Ferric Iron inclusions
sedimentary
Jasper (Green variety)
Silicon Dioxide (SiO₂)
sedimentary
Chert Nodule (Flint)
Silicon Dioxide (SiO2)
sedimentary
Red Jasper
Silica (Silicon Dioxide), Formula: SiO2 with Iron impurities
sedimentary
Red Jasper
Silicon dioxide (SiO2) with Iron inclusions
sedimentary
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
White Marble
Recrystallized Calcite (CaCO3)
metamorphic
River Rock
Sedimentary Rock (various compositions)
sedimentary
Desert Rose Fragment (Atypical) / Weathered Chert
Silicon Dioxide (SiO2) or Barium Sulfate (BaSO4) depending on exact mineralogy
sedimentary
Calamites Fossil (Horsetail Stem)
Calamites (Genus), part of the class Equisetopsida
sedimentary
Black Jasper
Silicon Dioxide (SiO2) with Carbonaceous inclusions
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral