Green Fluorite
Calcium Fluoride (CaF2)
mineral
Category
Mineraloid (Man Made Origin)
Browse mineraloid (man made origin) specimens identified by the Rock Identifier community.
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Fluorite Carving
Fluorite (Calcium Fluoride, CaF2)
mineral
Ocean Jasper
Orbicular Jasper (Silicon Dioxide with impurities like Hematite and Chlorite, SiO2)
sedimentary
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified Wood (primarily Chalcedony/Quartz, SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Green Fluorite in Host Rock
Fluorite (Calcium Fluoride, CaF2)
mineral
River Stone (Chert/Siltstone)
Cryptocrystalline Quartz (SiO2) with trace impurities
sedimentary
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Fossilized Shark Tooth
Fossilized elasmobranch tooth (Apatite/Calcium Phosphate)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
mineral
Sodalite
Sodalite - Na8(Al6Si6O24)Cl2
Mineral
Quartzite
Quartzite (primarily Silicon Dioxide, SiO2)
metamorphic
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Quartz Veined Rock (Likely Graywacke or Quartzite)
Silicon Dioxide (SiO2) veins in Metasedimentary matrix
metamorphic
Limestone Pebble
Limestone (Calcium Carbonate, CaCO3)
sedimentary
Greenstone
Protolith of basalt, diabase, or gabbro; often contains minerals like chlorite, actinolite, and epidote
metamorphic
Cavansite
Cavansite (Ca(VO)Si4O10·4H2O)
mineral
Jadeite (Nephrite-Jadeite blend)
Jadeite (NaAlSi2O6)
metamorphic
Petrified Wood
Silicified Wood (SiO2)
mineral
Ocean Jasper (Orbicular Jasper)
Silicon Dioxide (SiO2) with various inclusions
mineral
Greenstone
Greenschist (metamorphosed mafic igneous rock)
metamorphic
River Stone / Siltstone
Siltstone (composed of lithified silt)
sedimentary
Zoisite with Ruby (Anyolite)
Anyolite (Ca2Al3(SiO4)3(OH) + (Hb, Al, Cr)2O3)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Metamorphosed Quartz Sandstone
metamorphic
Gneiss
Gneiss (a type of metamorphic rock)
Metamorphic Rock
Calcite (commonly referred to as Orange Calcite or Honey Calcite given its color)
Calcite
Mineral
Vesicular Rhyolite
Rhyolite (High-silica volcanic rock)
igneous
Limonite-pseudomorph after Pyrite (Prophecy Stone)
Goethite and Limonite secondary minerals (FeO(OH)·nH2O) replacing Pyrite (FeS2)
mineral
Fossil / Permineralized Bone
Tyrannosaurus rex fossil (Hydroxylapatite replaced by various minerals)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Ruby
Corundum (Al2O3 with chromium impurities)
mineral
Sand Grain (Quartz)
Silicon Dioxide (SiO2)
sedimentary
Fluorite (likely Green Fluorite variant)
Calcium Fluoride (CaF2)
mineral
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, formula SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
sedimentary
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Fossil Coral
Scleractinia (Anthos), primarily Calcium Carbonate (CaCO3)
sedimentary
Moqui Marble (Sandstone Concretion)
Hematite-cemented Sandstone (Fe2O3 + SiO2)
sedimentary
Petrified Wood
Silicified wood (primarily Quartz/Chalcedony, SiO2)
mineral