Quartz
Silicon Dioxide (SiO2)
Category
Browse man made object (simulant) specimens identified by the Rock Identifier community.
Quartz
Silicon Dioxide (SiO2)
Jasper
Microcrystalline Quartz (SiO2)
Agate
Silicon Dioxide (Chalcedony), SiO2
Jasper
Microcrystalline Quartz (SiO2)
Jasper
Silicon Dioxide (SiO2), Microcrystalline Quartz
Jasper
Microcrystalline Quartz (SiO2)
Agate
SiO2
Dyed Agate
Agate (Silicon Dioxide, SiO2)
Rose Quartz Carving
Quartum roseum (Variety of Quartz, SiO2)
Obsidian
Volcanic glass (SiO2 - Silicon Dioxide)
Fossiliferous Limestone
Limestone (composed primarily of calcite with included fossils CaCO3)
Diamond
Diamond (pure Carbon, C)
Agate (specifically, multi-colored or pastel-dyed agate)
Silicon dioxide (SiO2) - specifically, a cryptocrystalline variety of quartz known as Chalcedony, with banding classified as Agate. (If it were Fluorite, the chemical formula would be Calcium Fluoride - CaF2).
Slate
Metamorphic Pelitic Rock
Jasper
Microcrystalline Quartz (SiO2)
Jasper
Microcrystalline Quartz (SiO2)
Jasper
Microcrystalline Quartz (SiO2)
Jasper
Microcrystalline quartz (SiO2)
Jasper
Microcrystalline Quartz (SiO2)
Agate
Silicon Dioxide (Chalcedony), SiO2
White Quartz
Quartz (Silicon Dioxide, SiO2)
Jasper
Microcrystalline Quartz (SiO2)
Jasper
Cryptocrystalline Quartz (SiO2)
Charoite with Aegirine inclusions
(K,Sr)15-16(Ca,Na)32[Si6O11(O,OH)6]2[Si12O18(O,OH)12]2[Si17O25(O,OH)18]2(OH,F)4.0-3.0 * nH2O + NaFeSi2O6
Green Aventurine
SiO2
Dyed Agate
SiO2
Granodiorite
Phaneritic Plutonic Intermediate-Felsic Rock
Diamond
Carbon (C)
Sandstone Concretion
Sedimentary concretion
Blue Lace Agate
Chalcedony (SiO2) with trace inclusions
Green Onyx (Commercial Marble/Travertine)
CaCO3 (Calcite / Banded Limestone)
Obsidian
Volcanic Glass (Amorphous Silicon Dioxide)
Serpentinite
Serpentinite (composed primarily of serpentine-group minerals like antigorite, chrysotile, and lizardite; chemical formula varies but generally Mg3Si2O5(OH)4)
Silver-bearing galena ore
Galena (PbS), likely in a quartz/carbonate-rich matrix with possible sulfide minerals
Diamond
Carbon (C)
Turquoise
Hydrous phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
Engraved polished dark stone (likely slate or basalt)
Probable fine-grained slate (microcrystalline phyllosilicates), possibly basalt; exact identification requires testing
Engineered Quartz Stone
Agglomerated Quartz (SiO2 + Polymer Resin)
Coquina
Bioclastic Limestone (composed primarily of CaCO3)
Diabase (Dolerite)
Diabase / Dolerite
Chert (Jasper Variant likely)
Silicon Dioxide (SiO2)
Land Snail Shell
Gastropoda (Calcium Carbonate, CaCO3)