Carnelian
SiO2 (Silicon Dioxide with Iron Oxide impurities)
Category
Browse carved stone specimens identified by the Rock Identifier community.
Carnelian
SiO2 (Silicon Dioxide with Iron Oxide impurities)
Carnelian (a variety of Chalcedony)
SiO2 (Silicon Dioxide) with Iron Oxide impurities
Obsidian
Volcanic Glass (SiO2 + impurities)
Carnelian (a variety of Chalcedony)
SiO2 (Silicon Dioxide) primarily colored by iron oxide (Hematite)
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
Strawberry Quartz (Hematoid Quartz)
Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Carnelian Agate
Carnelian (Silicon Dioxide - SiO2)
Blue Tiger's Eye
Silicified Riebeckite (SiO2)
Carnelian Agate
Silicon Dioxide with Hematite impurities (SiO2 + Fe2O3)
Carnelian
Carnelian (SiO2, Silicon Dioxide with Iron Oxide impurities)
Carnelian Agate
Silicon Dioxide (SiO2) - Variety of Chalcedony
Blue Lace Agate (Chert/Chalcedony)
Silicon dioxide (SiO2)
Snowflake Obsidian
Volcanic glass with Cristobalite inclusions (70–75% SiO2)
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
Carnelian Agate
Silicon Dioxide (SiO2) with iron oxide impurities
Tiger's Eye
SiO2 (Pseudomorph of Quartz after Crocidolite)
Carnelian (Chalcedony)
Silicon Dioxide (SiO2) with trace Iron Oxide
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Tree Agate
Silicon Dioxide (SiO2) with Chlorite inclusions
Black Obsidian
Volcanic Glass (Amorphous Silicon Dioxide SiO2)
Yellow Quartz (Chalcedony or Agate)
Silicon Dioxide (SiO2)
Ruby in Zoisite
Anyolite
Moldavite
Tektite (Silicates with aluminum, iron, manganese, and potassium oxide glass)
Jadeite Jade
NaAlSi2O6 (Sodium Aluminum Silicate)
Jade (Nephrite or Jadeite)
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)
Blue Apatite
Fluorapatite / Apatite Group (Ca5(PO4)3(F,Cl,OH))
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Rhodonite in Matrix
Rhodonite (Manganese Silicate) - (Mn2+,Fe2+,Mg,Ca)SiO3
Green Aventurine
Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
Obsidian
Volcanic Glass (SiO2 rich)
Malachite
Malachite [Cu2CO3(OH)2]
Banded Calcite (often sold as Onyx or Mexican Onyx)
Calcite (Calcium Carbonate, CaCO3)
Carnelian (Chalcedony)
Silicon Dioxide (SiO2)
White Quartz Beads
Silicon Dioxide (SiO2)
Sandstone (with Iron Staining)
Arenite (SiO2 with Fe2O3/FeOOH impurities)
Sandstone
Arenite (primarily SiO2)
Sandstone
Clastic Sedimentary Rock (composed mostly of SiO2)
Marble
Recrystallized Calcite (CaCO3)
Sandstone (likely Ferruginous)
Arenite (SiO2 based with Fe2O3/FeO(OH) cement)
Sandstone
Arenite (composed primarily of SiO2)
Banded Calcite (Mexican Onyx)
Calcium Carbonate (CaCO3)