Pyrite
Iron Sulfide (FeS2)
Category
Browse not a rock (animated character) specimens identified by the Rock Identifier community.
Pyrite
Iron Sulfide (FeS2)
Common Green Opal
Hydrated amorphous silicon dioxide (SiO2·nH2O)
Quartz in Limonite-rich Matrix
Silicon Dioxide (SiO2) with Goethite/Limonite FeO(OH)·nH2O
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Tree Agate
Dendritic Agate (Silicon Dioxide, SiO2)
Amethyst
Amethyst (Silicon Dioxide - SiO2 with iron impurities)
Amethyst Quartz with Matrix
Silicon Dioxide (SiO2)
Red Quartz (Carnelian/Red Jasper Agate)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Carnelian
Carnelian (a variety of Chalcedony), SiO2 (Silicon Dioxide)
Carnelian
Carnelian (SiO2)
Basalt Pebble
Extrusive Mafic Igneous Rock
Basalt
Basalt (Mafic volcanic rock)
Tiger's Eye
Silicon dioxide (SiO2) with fibrous inclusions of crocidolite (riebeckite) that have been altered to limonite and then replaced by quartz
Rutilated Quartz (beads)
SiO2 with TiO2 inclusions (Titanium Dioxide inclusions within Quartz)
Vesicular Basalt
Extrusive mafic igneous rock
Breccia
Clastic Breccia (SiO2/CaCO3 dominated)
Labradorite
(Ca, Na)(Al, Si)4O8
Pink Tumbled Agate (Dyed)
Silicon Dioxide (SiO2) with artificial dyes
Quartzite
Quartzite (SiO2)
Wonderstone
Banded Rhyolite (SiO2 with impurities)
N/A
Rock Crystal Quartz
Quartz (SiO₂)
Diorite
Diorite
Sandstone (Ferruginous)
Arenite with Iron Oxide cement (SiO2 + Fe2O3)
Snowflake Obsidian
Spherulitic Volcanic Glass (primarily SiO2 with Cristobalite inclusions)
Quartzite
Quartzite (SiO2)
Quartzite
Quartzite (SiO2)
Amethyst Quartz
Silicon Dioxide (SiO2) with iron impurities
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
Carnelian Agate
Silicon Dioxide (SiO₂)
Quartzite
Quartzite (primarily SiO2)
Red Sandstone
Arenite (Ferruginous Sandstone)
Serpentine, likely a variety of Chrysoprase (green chalcedony) or a similar translucent green mineral.
Serpentine Group Minerals (e.g., Antigorite, Lizardite) or Chalcedony (SiO2) with nickel impurities for Chrysoprase green.
Bauxite
Bauxite (Principal ore of aluminum; mixture of minerals including Gibbsite Al(OH)3, Boehmite and Diaspore AlO(OH))
Orange Calcite
Calcium Carbonate (CaCO3)
Pyrite
Iron Sulfide (FeS2)
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
Man-made Carved Stone (Scream Mask/Skull motif)
Carved Soapstone or Serpentine-rich rock
White Topaz
Topaz - Al2SiO4(F,OH)2
Blue Calcite
Calcium Carbonate (CaCO3)
Clear Quartz
Silicon Dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)