Sandstone
Clastic sedimentary rock (Quartz arenite/Arkose)
Category
Browse mineral (man made composite) specimens identified by the Rock Identifier community.
Sandstone
Clastic sedimentary rock (Quartz arenite/Arkose)
Chrysocolla in Malachite
Cu2CO3(OH)2 (Malachite) / Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla)
Rough Diamond
Diamond (pure Carbon, C)
Sunstone
Andesine-Labradorite Feldspar ((Ca,Na)(Al,Si)4O8)
Diamond
Native Carbon (C)
Natural Pearl (appearing in a jewelry setting)
Calcium Carbonate (mostly Aragonite), CaCO3 with Conchiolin
Quartz (Microcrystalline/Chert)
Silicon Dioxide (SiO2)
Desert Rose (Baryte or Gypsum Rose)
Baryte (BaSO4) or Gypsum (CaSO4·2H2O)
Synthetic Convention Badge (Plastic/PVC)
Polyvinyl Chloride (PVC) / Polycarbonate
Smoky Quartz
Silicon Dioxide (SiO2) with trace aluminum and irradiation
Granite
Phaneritic plutonic rock (Quartz, Feldspar, Mica)
Malachite
Malachite (Copper Carbonate Hydroxide) - Cu2CO3(OH)2
Green Aura Quartz (Titanium treated Kyanite or Quartz)
Silicon Dioxide (SiO2) or Aluminum Silicate (Al2SiO5) with Titanium/Metal Oxide coating
Sandstone (likely Quartzose Sandstone)
Arenite
Smoky Quartz
Silicon Dioxide (SiO2)
Diorite (Gneissic)
Diorite
Tiger Iron
Tiger Iron (Hematite, Red Jasper, and Chert/Tiger's Eye composite)
Basalt
Basalt (extrusive igneous rock)
Pearl
Calcium Carbonate (CaCO3) with Conchiolin
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
Banded Calcite or Travertine
Calcium Carbonate (CaCO3)
Pearl
Calcium Carbonate (mostly Aragonite), CaCO3 (with conchiolin)
Diamond (in jewelry setting)
Carbon (C)
Diamond (in jewelry setting)
Adamantine Carbon (C)
Granite
Phaneritic Felsic Igneous Rock (primarily Quartz, Feldspar, and Mica)
Granite
Granite (Felsic Plutonic Rock)
Pink Granite (Alkali-feldspar Granite)
Felsic intrusive igneous rock (composition: KAlSi3O8, SiO2, NaAlSi3O8)
Coquina
Bioclastic Limestone
Aragonite (specifically Mexican Marbled Onyx)
Aragonite (Calcium Carbonate, CaCO3)
Obsidian
Volcanic Glass (Amorphous Silicon Dioxide)
Goldstone
Aventurine Glass (SiO2 + Cu small inclusions)
Dyed Quartz (imitating Emerald/Green Quartz)
Silicon Dioxide (SiO2) with artificial pigment
Blue Goldstone
Aventurine Glass
Sandstone
Arenite (composed primarily of Quartz: SiO2)
Granite
Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)
Ferruginous Sandstone (Ironstone)
Clastic Sedimentary Rock (composed of SiO2 with Fe2O3/FeO(OH) cement)
Obsidian
Volcanic Glass (70% or more SiO2)
Pumice
Pumice (Vesicular volcanic glass)
Sandstone
Arenite
Granite (Pegmatitic)
Phaneritic Felsic Igneous Rock
Desert Rose (also known as Sand Rose)
Gypsum (CaSO4·2H2O) or Barite (BaSO4) with sand inclusions
Pearl
Aragonite (CaCO3 with conchiolin)