Black volcanic rock (possibly obsidian or basalt)
Indeterminate from the image; candidates include volcanic glass (obsidian, SiO₂-rich) or basalt (plagioclase–pyroxene-rich)
Category
Browse carved stone specimens identified by the Rock Identifier community.
Black volcanic rock (possibly obsidian or basalt)
Indeterminate from the image; candidates include volcanic glass (obsidian, SiO₂-rich) or basalt (plagioclase–pyroxene-rich)
Unakite
Altered Granite (Granite composed of orthoclase feldspar, epidote, and quartz)
Polished banded calcite pendant (often sold as “onyx marble” or “banded onyx”)
Calcite, CaCO₃; trade name “onyx marble”
Amber
Fossilized tree resin (predominantly cross-linked terpenoid polymers)
Red Jasper
Silicon Dioxide with Iron Oxide (SiO2)
Green Quartzite
Silicon Dioxide (SiO2) with inclusions (e.g., Fuchsite or Actinolite)
Greenstone with Magnetite Veins
Metabasalt (Greenstone)
Labradorite (likely)
(Ca,Na)(Al,Si)4O8
Tourmalinated Quartz
SiO2 with NaFe3+3Al6(BO3)3Si6O18(OH)4 inclusions
Granodiorite
Granodiorite (intermediate intrusive igneous rock containing plagioclase, quartz, and K-feldspar)
Black Obsidian
Volcanic Glass (SiO2 + impurities)
Polished Red Jasper
SiO2 (Microcrystalline Quartz)
Diorite (Salt and Pepper Rock)
Diorite
Diorite
Diorite (Intermediate intrusive igneous rock)
Petoskey Stone
Hexagonaria percarinata
Coral Fossil (Petoskey-style or Colonial)
Hexagonaria percarinata (Order: Rugosa)
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
Granodiorite
Phaneritic intrusive igneous rock
Sandstone
Clastic Sedimentary Rock
Diorite (Salt and Pepper Rock)
Diorite
Granite
Intrusive Igneous Rock (composed primarily of Quartz: SiO2, Feldspar: KAlSi3O8, and Mica: KAl2(AlSi3O10)(OH)2)
Japanese garden lantern and stepping stones
Likely granite (quartz, feldspar, and mica), though exact stone cannot be confirmed from the image
Carved limestone architectural fragment
Limestone, predominantly calcite (CaCO₃), possibly weathered fossiliferous or oolitic limestone
Granodiorite
Granodiorite (phaneritic intrusive igneous rock)
Granite (Pink/Red Granite)
Phaneritic Igneous Rock (primarily SiO2, KAlSi3O8, NaAlSi3O8)
Blue Lace Agate
Chalcedony (SiO2)
Unakite
Altered Granite (Epidote, Orthoclase Feldspar, Quartz)
Green Aventurine
Quartz (Silicon Dioxide with fuchsite inclusions, SiO2)
Serpentine (Serpentinite)
Serpentine group / Serpentinite (predominantly (Mg,Fe)3Si2O5(OH)4)
Green Aventurine
Quartz with Fuchsite inclusions (SiO2)
Red Sandstone with Quartz Vein
Sedimentary Quartz Arenite with SiO2 vein
Green Aventurine
Quartz with fuchsite inclusions (SiO2)
Jasper
Microcrystalline quartz (SiO2)
Green Aventurine
Quartz (Silicon Dioxide, SiO2)
Granite
Phaneritic Felsic Igneous Rock (Granite)
Green Calcite
Calcium Carbonate (CaCO3)
Selenite
Gypsum (CaSO4·2H2O)
Mother of Pearl
Nacre
Selenite
Gypsum (CaSO4·2H2O)
Satin Spar Selenite
Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)
Opalite
Synthetic glass / Opalized glass
Granite
Granite (Phaneritic intrusive igneous rock)