Smoky Quartz
Silicon Dioxide (SiO2)
Category
Browse not a rock (animated character) specimens identified by the Rock Identifier community.
Smoky Quartz
Silicon Dioxide (SiO2)
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
Herkimer Diamond (Quartz Crystal)
Silicon Dioxide (SiO2)
Amethyst
Silicon Dioxide (SiO2) with traces of Iron and Manganese
Obsidian
Volcanic Glass (SiO2)
Moss Agate
Chalcedony (Silicon Dioxide) with dendritic inclusions (SiO2)
Vesicular Basalt
Basalt with vesicular texture
Greenschist / Greenstone
Greenschist facies metabasite
Labradorite
(Ca, Na)(Al, Si)4O8
Labradorite (Feldspar)
Labradorite, (Ca,Na)(Al,Si)4O8
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
Desert Rose (Baryte or Selenite variant)
Barium Sulfate (BaSO4) or Gypsum (CaSO4·2H2O) with Sand inclusions
Chert (and Quartz Gravel)
Chert (Cryptocrystalline Quartz, SiO2)
Sandstone (Ferruginous)
Arenite (variable SiO2 with Fe2O3 staining)
Pebble (likely a type of sandstone or quartzite pebble)
Clastic Sediment (specifically, a rudite-sized clast). If the pebble is composed of a specific rock type, its scientific name would be that rock type (e.g., 'Quartzite pebble', 'Granite pebble', 'Chert pebble'). Given its appearance, it is likely a metamorphic quartzite pebble or a hard sandstone pebble.
Moss Agate
Silicon Dioxide with inclusions (SiO2)
Crinoid Fossil in Limestone
Crinoid (Class Crinoidea) in Fossiliferous Limestone (CaCO3)
Citrine
Silicon Dioxide (SiO2)
Banded Agate (specifically Sardonyx or Carnelian Agate)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
Ferruginous Sandstone (Red Sandstone)
Arenite with Hematite/Limonite cement
Sandstone (Quartzite-rich Pebble)
Arenite (composed primarily of SiO2)
Amethyst
Amethyst (Silicon Dioxide, SiO2)
Basalt River Cobble
Basalt (Mafic Extrusive Igneous Rock)
Fluorite
Fluorite (Calcium Fluoride, CaF2)
Carnelian
Carnelian (Silicon Dioxide - SiO2)
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Amethyst
Amethyst (variety of Quartz, SiO2)
Spiny Oyster Shell
Spondylus varians (Biogenic Calcium Carbonate)
Polished Jasper (Mushroom Carving)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Brown Agate
Silicon Dioxide (SiO2)
Yellow Jasper
Silicon Dioxide (SiO2) with iron inclusions
Pyrite
Iron Sulfide (FeS2)
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
Unakite
Unakite (Altered Granite consisting of Orthoclase KAlSi3O8, Epidote Ca2(Al,Fe)3(SiO4)3(OH), and Quartz SiO2)
Basalt Pebble
Basalt
River Rock (Greywacke/Siltstone)
Siltstone / Argillaceous Greywacke
Carnelian
Carnelian (Silica, SiO2)
Amethyst (Tumbled/Weathered Quartz)
Amethyst (SiO2 with iron impurities)
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Limonite with Opal infusion
FeO(OH)·nH2O (Limonite) / SiO2·nH2O (Opal)
Quartzite
Quartzite (SiO2)
Granite
Granite (Silicic Plutonic Rock)