Chert (Flint)
Chert (SiO2)
Category
Browse mineral (man made glass) specimens identified by the Rock Identifier community.
Chert (Flint)
Chert (SiO2)
Red Sandstone
Quartz Arenite (iron-stained) / SiO2
Chert (Flint / Jasper variant)
Microcrystalline Quartz (SiO2)
Chert
Microcrystalline quartz (SiO2)
Vesicular Basalt (or Scoria)
Vesicular Basalt
Diamond (faceted)
Diamond (Pure Carbon, C)
Pearl
Aragonite (CaCO3) with Conchiolin
Quartz Sandstone Pebble
Sandstone (SiO2 dominated)
Chert (Black Flint)
Silicon Dioxide (SiO2)
Asphalt (Bituminous Concrete)
Composite material (bitumen binder with mineral aggregate)
Jasper (Iron-rich Chalcedony)
Jasper (Microcrystalline Silicon Dioxide, SiO2 plus iron oxide impurities)
Chert (Flint)
Silicon Dioxide (SiO2)
Polished white chalcedony or milky quartz pebble
Chalcedony, microcrystalline quartz (SiO₂), possibly with iron-oxide staining or a minor mineral inclusion
Diamond
Carbon (C)
Brown Chert
Microcrystalline Quartz (SiO2)
Sandstone
Arenite (SiO2 based)
Terrazzo (Synthetic Composite Rock)
Cementitious or Epoxy Resin-bound Aggregates
Granite
Phaneritic Felsic Igneous Rock
Amethyst
SiO2 (Silicon Dioxide)
Chrysocolla
Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O
Chert (Common Opal/Jasper variety)
Cryptocrystalline Quartz (SiO2)
Chert
Microcrystalline quartz (SiO2)
Granite
Intrusive Felsic Igneous Rock (primarily Quartz and Feldspar)
Chert (Flint Nodules)
Cryptocrystalline Quartz (SiO2)
Chalcedony (Agate/Chert variety)
Silicon Dioxide (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Quartzite
Metamorphic Quartzite (SiO2)
Chert (varieties include Flint and Mudstone)
Microcrystalline Silica (SiO2)
Chert (Flint)
Silicon Dioxide (SiO2)
Diamond
Carbon (C)
Sandstone
Arenite
Chert (Flint/Chalcedony)
Silicon Dioxide (SiO2)
Moonstone (specifically Rainbow Moonstone / White Labradorite)
White Labradorite (Feldspar Group: (Na,Ca)(Al,Si)4O8)
Diamond
Diamond (pure Carbon, C)
Iron Slag
Ferrous slag (primarily silicates and oxides of calcium, iron, and magnesium)
Chert
Microcrystalline Quartz (SiO2)
Eroded Brick or Pumice-like Scoria
Vesicular Basalt / Scoria (Anthropogenic variant: Eroded Firebrick)
Quartzite
Quartzite (SiO2)
Sunstone (Aventurine Feldspar)
(Ca,Na)((Al,Si)2Si2O8) with inclusions of Cu or Fe2O3
Rough Diamond
Pure Carbon (C)
Sunstone
(Ca,Na)((Al,Si)2Si2O8) - Plagioclase Feldspar
Pearl
Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3