Prehnite
Prehnite - Ca2Al(AlSi3O10)(OH)2
mineral
Category
Not A Rock (Animated Character)
Browse not a rock (animated character) specimens identified by the Rock Identifier community.
Fire Agate
Silicon Dioxide (SiO2) with layered Iron Oxide (Limonite/Goethite)
mineral
Rainbow Fluorite
Calcium Fluoride (CaF2)
mineral
Agate (Banded Chalcedony)
Agate (Silicon Dioxide, SiO2)
mineral
Staurolite (Cross Stone)
Staurolite (Fe2+2Al9Si4O23(OH))
metamorphic
Aventurine
Quartzite with inclusions (SiO2 containing Fuchsite chrome mica)
metamorphic
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Mineral
Banded Agate
Cryptocrystalline Quartz (SiO2)
mineral
Massive Quartz
Silicon Dioxide (SiO2)
mineral
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Labradorite
Labradorite (Plagioclase Feldspar Series) - (Ca, Na)(Al, Si)4O8
mineral
Diabase (Trap Rock)
Diabase (also known as Dolerite)
igneous
Gneiss (specifically a Banded Gneiss pebble)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Specular Hematite
Specularite (Fe2O3)
mineral
Moss Agate
Silicon Dioxide (SiO2) with inclusions of hornblende, chlorite, or manganese/iron oxides
mineral
Dyed Magnesite (often sold as Red Turquoise or Howlite)
Magnesium Carbonate (MgCO3)
mineral
Jasper (Multi-color Chert)
Silicon dioxide (SiO2)
sedimentary
Botryoidal Chalcedony (likely Chert or Agatized Coral)
Silicon Dioxide (SiO2)
mineral
Jasper (specifically Bloodstone or Heliotrope variety)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary (chemically precipitated)
Bicolor Quartz Pebble
Silicon Dioxide (SiO2) with mineral inclusions
mineral
Lavender Agate / Chalcedony Sphere
Agate (Microcrystalline Quartz) - SiO2
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
mineral
Amazonite
Potassium feldspar (Microcline), K(AlSi3O8)
mineral
Graphite
Graphite (Native Carbon, C)
metamorphic
Almandine Garnet (weathered)
Almandine (Fe3Al2(SiO4)3)
mineral
Black Tourmaline (Schorl)
Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
Sedimentary
Green Agate
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite inclusions)
mineral
Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions) - SiO2
metamorphic
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Banded Agate (Yellow/Honey Agate)
Agate (Cryptocrystalline Quartz, SiO2)
mineral
Banded Agate (specifically Mexican Lace Agate variety appearance)
Silicon Dioxide (SiO2 / Chalcedony)
mineral
Rough Green Tourmaline (Verdelite)
Elbaite (Complex Silicate) - Na(Li,Al)3Al6(BO3)3Si6O18(OH)4
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
Mineral
Mica Schist
Medium-grade regional metamorphic rock (composition varies)
metamorphic
Granite (weathered/river-tumbled)
Granite (Plutonic Igneous Rock)
Igneous Rock
Shale
Shale (clastic sedimentary rock)
Sedimentary
Greenstone (metamorphosed basalt)
Greenschist / Meta-basalt
metamorphic