Fluorite
Calcium Fluoride (CaF2)
mineral
Category
Anthropogenic (Man Made Artifact)
Browse anthropogenic (man made artifact) specimens identified by the Rock Identifier community.
Banded Iron Formation (BIF)
Banded Iron Formation
Sedimentary Rock
Jade (Nephrite or Jadeite)
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)
Mineral
White Quartz
Quartz (SiO2)
Mineral
Bloodstone Jasper (Heliotrope)
SiO2 (Silicon Dioxide) - Cryptocrystalline Quartz
sedimentary
Red Jasper (possibly Brecciated Jasper or Bloodstone variety)
Jasper (Silicon Dioxide, SiO2)
sedimentary
Yellow Quartz (Citrine/Lemon Quartz)
Silicon Dioxide (SiO2)
mineral
Pegmatite (Granite Pegmatite)
Intrusive Igneous Rock (Granite Pegmatite)
igneous
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Obsidian
Obsidian (Volcanic Glass), primarily SiO2 (70% or more silicon dioxide)
Igneous
Fluorite
Calcium Fluoride (CaF2)
mineral
Petrified Wood
Silicified wood, primarily composed of Quartz (SiO2)
Mineral, often found in sedimentary deposits
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Obsidian
Obsidian (Volcanic Glass)
igneous
Fossil Coral
Cnidaria fossil (often Calcium Carbonate / CaCO3)
sedimentary
Fossil Coral
Cnidaria Anthozoa (Fossilized)
sedimentary
Vesicular Basalt (River Rock)
Afanitic Vesicular Basalt
igneous
Jasper Agate (specifically Brecciated Jasper)
Silicon Dioxide (SiO2) with iron oxide and clay impurities
sedimentary
Chalcedony
Silicon Dioxide (SiO2)
mineral
Fossilized Crab Carapace (Concretion)
Decapoda (fossil), typically preserved in calcite or siderite concretion
sedimentary
Turquoise
Turquoise (Hydrated phosphate of copper and aluminium), CuAl6(PO4)4(OH)8·4H2O
mineral
Jasper (Red Chert)
Jasper (Silicon Dioxide, SiO2)
sedimentary
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Iron Ore / Ironstone Concretion
Mixture of iron oxide/hydroxide minerals, likely some combination of Hematite (Fe2O3), Goethite (α-FeOOH), and Limonite (a general term for hydrated iron oxides of variable composition) or potentially Bauxite (a mixture of aluminum hydroxides, often with iron oxides, (Al(OH)3) and FeO(OH)). The visual characteristics strongly suggest iron-rich material.
Mineral, specifically an iron ore
Jasper (Imperial Jasper style)
Silicon Dioxide (SiO2) with impurities
sedimentary
Chalcedony (Botryoidal Agate)
Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Sandstone (Ferruginous)
Arenite (with Iron Oxide)
sedimentary
Quartz
SiO₂ (Silicon Dioxide)
Mineral
Red Sandstone
Arenite (primarily Quartz with Iron Oxide coating)
sedimentary
Sandstone (Quartzose)
Arenite (composed primarily of SiO2)
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite
Fluorite (Calcium Fluoride - CaF2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Sandstone (likely with Quartz Veining)
Arenite (primarily SiO2)
sedimentary
Diamond
Carbon (C)
mineral
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Jasper
Silicon dioxide (SiO2)
sedimentary
Limonite / Ironstone Nodule
Limonite (Hydrated iron(III) oxide-hydroxide), FeO(OH)·nH2O
mineral
Fancy Jasper
Chalcedony (cryptocrystalline quartz) with inclusions
Mineral