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