Water-worn pebble, likely greenstone
Greenstone (metamorphosed mafic volcanic rock; commonly chlorite-, actinolite-, and epidote-bearing)
Category
Browse carved stone specimens identified by the Rock Identifier community.
Water-worn pebble, likely greenstone
Greenstone (metamorphosed mafic volcanic rock; commonly chlorite-, actinolite-, and epidote-bearing)
Likely blue calcite
Calcite, CaCO₃
Polished banded calcite (onyx marble)
Calcite, CaCO₃; commonly sold as banded calcite or “onyx marble”
Blue Lace Agate
Silicon Dioxide (SiO2)
Tumbled blue-gray stone, likely labradorite or sodalite
Possibly labradorite (plagioclase feldspar, approximately NaAlSi₃O₈–CaAl₂Si₂O₈) or sodalite (Na₈(Al₆Si₆O₂₄)Cl₂)
Milky quartz
Quartz (silicon dioxide, SiO₂)
Milky quartz
Quartz, silicon dioxide (SiO₂)
Carnelian
Silicon Dioxide (Quartz variety), SiO2
Moss Agate
Silicon Dioxide with inclusions (SiO2 + Fe/Mn/Mg)
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
Granite
Phaneritic Felsic Igneous Rock
Granite
Phaneritic plutonic rock (mainly Quartz, Feldspar, and Mica)
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions
Satin Spar (often sold as Selenite)
Gypsum (CaSO4·2H2O)
Agate
Silicon Dioxide (Chalcedony variety, $SiO_2$)
Carnelian
SiO2 (Quartz variety)
Diorite (Salt and Pepper Rock)
Diorite
Sandstone (with Calcite or Silica veins)
Clastic sedimentary rock (primarily SiO2)
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
Red Jasper
Microcrystalline Quartz (SiO2)
Red Jasper (Polished Point Pendant)
Silicon Dioxide with Iron Oxide impurities (SiO2 + Fe2O3)
Granite
Granite (Felsic intrusive igneous rock)
Granite
Phaneritic Plutonic Rock (primarily Quartz, Feldspar, and Mica/Amphibole)
Granite
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)
Sandstone (Ferruginous Concretion)
Arenite (with iron oxide cement)
Sandstone
Quartz Arenite
Sandstone (with Iron Staining)
Clastic sedimentary rock (High Silica / Iron Oxide)
Granite
Granite
Sandstone
Arenite (SiO2 based)
Volcanic Tuff (Breccia)
Pyroclastic Tuffaceous Rock
Dalmatian Stone
Peralkaline Quartz-Feldspar Rock
Soapstone
Steatite (Hydrated magnesium silicate)
Red Jasper
Microcrystalline Quartz (SiO2 with Fe2O3 inclusions)
Red Jasper
Microcrystalline Quartz (SiO2)
Bloodstone
Chalcedony (Quartz)
Granite
Granite (Felsic Plutonic Rock)
Green Jasper
Silicon Dioxide (SiO2) with mineral inclusions (chlorite/iron silicates)
Granite
Phaneritic Plutonic Igneous Rock (composed of Quartz, Feldspar, and Mica)
Granite
Phaneritic Plutonic Igneous Rock (composed of Quartz, Alkali Feldspar, and Plagioclase)
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, e.g., Lizardite, Chrysotile, Antigorite)
Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
Unakite
Epidotized Granite