Tree Agate
Silicon Dioxide (SiO2)
Category
Browse sedimentary (processed mineral product) specimens identified by the Rock Identifier community.
Tree Agate
Silicon Dioxide (SiO2)
Orange Quartz
Crystalline Silicon Dioxide (SiO2) with iron oxide inclusions
Gold Nugget
Native Gold (Au)
White Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Dyed Agate
Chalcedony (Silicon Dioxide, SiO2)
Sodalite
Na8(Al6Si6O24)Cl2 (Sodalite)
Sandstone with Quartz Vein
Arenite with SiO2 intrusion
Tiger's Eye
SiO2 (Pseudomorph of Quartz after Crocidolite)
Serpentinite
Serpentinite (composed primarily of Serpentine minerals: Mg3Si2O5(OH)4)
Granite
Phaneritic Igneous Rock (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)
Amber
(C10H16O)n – an amorphous organic substance, primarily composed of polymerized isoprenoids.
Granite
Granite (Felsic intrusive igneous rock)
Greenstone
Metabasalt / Greenschist facies rock
Quartz (River Pebble)
Silicon Dioxide (SiO2)
Moss Agate
Chalcedony (Silicon Dioxide, SiO2) with inclusions
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Amber (Black)
Amber (succinite, retinite, etc., specifically, heavily included/dark varieties)
Serpentine (Serpentinite)
Antigorite, Lizardite, and Chrysotile: (Mg,Fe)3Si2O5(OH)4
Smoky Quartz
Quartz (SiO₂)
Tiger's Eye (often misinterpreted as Gold Ore in this context)
Pseudomorph of Quartz after Crocidolite (SiO2)
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Pyrite
Iron Sulfide (FeS2)
Moss Agate
Silicon Dioxide with inclusions (SiO2)
Tiger's Eye
Pseudomorph of quartz after crocidolite (SiO2 with iron oxide inclusions)
Carnelian
Chalcedony (cryptocrystalline quartz), SiO2 (Silicon Dioxide)
Concrete
Anthropogenic Sedimentary Conglomerate (Cement mixture: typically Ca2SiO4, Ca3SiO5, Ca3Al2O6)
Clear Quartz Crystal Cluster
Silicon Dioxide (SiO2)
Snowflake Obsidian
Spherulitic Obsidian (Amorphous volcanic glass with Phenocrysts of Cristobalite)
Iron-stained Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
Ferrosilicon Slag (Industrial Vitrified Glass)
Vitreous Silicate Residue
Textile (Upholstery Fabric)
Woven Polyethylene/Polyester or Cotton Blend
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
Gold Nugget
Native Gold (Au)
Ferruginous Quartz
Quartz (Silicon Dioxide) - SiO2 with Iron Oxide inclusions
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
Tiger's Eye
Tiger's Eye (Pseudomorph of Quartz after Crocidolite), SiO2
Rainbow Obsidian
Volcanic Glass (SiO2 + impurities)
Quartz
Quartz (SiO₂ - Silicon Dioxide)
Quartz Mineral
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)