Chert
Microcrystalline quartz (SiO2)
Category
Browse man made mineral simulant (glass) specimens identified by the Rock Identifier community.
Chert
Microcrystalline quartz (SiO2)
Chert
Microcrystalline quartz (SiO2)
Titanium Coated Aura Quartz (Apple Aura Quartz)
Silicon Dioxide (SiO2) with Metallic Vapor Deposition Coating
Sandstone
Sandstone (clastic sedimentary rock, predominantly SiO2)
Sandstone
Sedimentary Rock (Quartz Sandstone)
Chert (with nodule)
Microcrystalline Quartz (SiO2)
Synthetic Marbled Aggregate (Footwear Component)
Ethylene-vinyl acetate (Croslite™)
Red Sandstone
Arenite (Ferruginous Sandstone)
Chert (Flint)
Silicon Dioxide (SiO2)
Quartzite
Quartzite (Metamorphic Quartz Sandstone)
Brecciated Jasper
Brecciated Jasper (Microcrystalline Quartz / SiO2)
Diamond (in Jewelry)
Carbon (C)
Slag (Industrial Byproduct)
Ferro-silicate glass (Slag)
Granodiorite
Phaneritic Plutonic Intermediate-Felsic Rock
Chert Pebble/Nodule
Chert (a microcrystalline or cryptocrystalline sedimentary form of quartz, SiO2)
Polished black stone egg, probably black obsidian
Obsidian, a natural volcanic glass; composition primarily silica-rich glass (approximately SiO₂), with variable iron and other trace elements
US Penny
Cuprum (Copper: Cu) and Zincum (Zinc: Zn) Alloy
Red Quartzite
Quartzite (Metamorphic quartz sandstone)
Sandstone
Clastic Sedimentary Rock
Tektite (Indochinite)
Tektite (Amorphous Silica Glass)
Banded agate pendant (likely carnelian or brown-and-white chalcedony agate)
Agate, a banded variety of chalcedony; microcrystalline quartz, SiO₂, with iron-oxide coloration
Sandstone
Arenite (composed primarily of SiO2)
Pearls (likely freshwater cultured pearls)
Pearl: nacre, primarily aragonite (CaCO₃) with conchiolin
Natural Pearl
Calcium carbonate (primarily Aragonite and Conchiolin), CaCO3
Sandstone (likely Quartzose)
Clastic sedimentary rock (SiO2 primary)
Bog Iron / Limonite Concretion
Goethite/Limonite mixture (FeO(OH)·nH2O)
Clay Brick
Ceramic structural unit (Al2O3·2SiO2·2H2O as precursor)
Chert (Black Chert or Flint)
Silicon Dioxide (SiO2)
Quartzite
Metamorphic Quartzite (SiO2)
Turquoise
Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O
Chert (variations include Flint/Novaculite)
Chert (formula: SiO2)
Chert / Flint
Microcrystalline Quartz (SiO2)
Chert (Flint)
Cryptocrystalline Quartz (SiO2)
Raw Diamond
Carbon (C)
Diorite
Intermediate plutonic igneous rock
Chert (often called Flint)
Chert (SiO2)
Flint / Chert
Microcrystalline quartz (SiO2)
Chert (Flint)
Chert (SiO2)
Chert (Quartz Variety)
Chert (Silicon Dioxide, SiO2)
Granodiorite / Granite (Weathered)
Granodiorite
Chert
Microcrystalline quartz (SiO2)
Granite
Granite (a plutonic rock)