Chalcedony (Agate/Chert variety)
Silicon Dioxide (SiO2)
Category
Browse man made (synthetic rock) specimens identified by the Rock Identifier community.
Chalcedony (Agate/Chert variety)
Silicon Dioxide (SiO2)
Basalt
Basalt
Chert (Flint / Jasper)
Silicon Dioxide (SiO2)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Sandstone
Arenite (SiO2 based typically)
Granite
Granite (phaneritic intrusive igneous rock consisting of quartz, feldspar, and mica)
Chalk
Carbonate rock (mainly CaCO3)
Quartz Sandstone Pebble
Sandstone (SiO2 dominated)
Clay Brick
Ceramic structural unit (Al2O3·2SiO2·2H2O as precursor)
Sandstone
Sedimentary Clastic Rock (Quartzose Sandstone)
Sandstone
Arenite (variable SiO2 composition)
Sandstone
Arenite
Granite
Phaneritic Felsic Igneous Rock
Chert (Flint)
SiO2 (Microcrystalline Quartz)
Clear quartz crystal sphere
Quartz (silicon dioxide, SiO₂)
Sandstone
Arenite (composed primarily of SiO2)
Bivalve Fossil (Shell Fragment)
Class Bivalvia (Calcium Carbonate - CaCO3)
Sandstone
Arenite (primarily SiO2)
Sandstone (Quartz Arenite)
Sandstone (dominated by SiO2 quartz grains)
Ruby (or potential synthetic/imitation)
Corundum (Al2O3)
Tumbled brown chalcedony (likely jasper or agate)
Microcrystalline quartz, SiO₂; chalcedony with iron-oxide staining
Basalt
Basalt (Mafic volcanic rock)
Diamond
Natural Diamond (Carbon, C)
Diamond (Cut Gemstone)
Carbon (C)
Chert Arrowhead
Cryptocrystalline Quartz (SiO2)
Granite
Granite (plutonic igneous rock)
Native Silver
Silver (elemental Ag)
Synthetic Sapphire and Ion-X Glass
Single-crystal Alumina (Al2O3) and Ion-strengthened Aluminosilicate Glass
Quartzite
Metamorphic Quartzite (SiO2)
Chert (Flint / Jasper variant)
Microcrystalline Quartz (SiO2)
Marble
Metamorphic Limestone (CaCO3)
Sandstone
Sandstone (composed predominantly of Quartz, SiO2, with Feldspar and Clay minerals)
Dyed Alum or Dyed Quartz (Ornamental Crystal)
Silicon Dioxide (SiO2) or Potassium Alum [KAl(SO4)2·12H2O]
Ruby
Corundum (Al2O3)
Chert (often called Flint)
Chert (Microcrystalline or cryptocrystalline Silica, SiO2)
Sandstone
Arenite (composed primarily of SiO2)
Nickel coin (U.S. currency)
Cupronickel (75% Copper, 25% Nickel alloy)
Sandstone (likely Quartzose)
Clastic sedimentary rock (SiO2 primary)
Granite
Phaneritic Felsic Igneous Rock
Basalt
Basalt (Mafic volcanic rock)
Diorite
Intermediate plutonic igneous rock
Granite
Granite (Felsic Plutonic Rock)