Fluorite in Matrix
Calcium Fluoride (CaF2) with Quartz/Calcite matrix
Category
Browse man made composite (lithified equivalent of sedimentary) specimens identified by the Rock Identifier community.
Fluorite in Matrix
Calcium Fluoride (CaF2) with Quartz/Calcite matrix
Flint
SiO2 (Microcrystalline Quartz / Chert)
Chert Pebble
Microcrystalline Quartz (SiO2)
Fluorite
Calcium Fluoride (CaF2)
Tumbled quartz (likely clear quartz)
Quartz, silicon dioxide (SiO₂)
Likely chlorite-bearing schist (possibly greenschist)
Chlorite–quartz–mica schist; commonly contains muscovite/biotite and feldspar
Quartz–feldspar–mica metamorphic rock, likely gneiss
Gneiss; composition commonly quartz (SiO₂), feldspars, biotite/hornblende, and minor accessory minerals
Weathered quartz-rich pebble (tentative)
Likely quartz/chalcedony, SiO₂, possibly iron-stained
Tumbled quartz (likely rose or milky quartz)
Quartz, silicon dioxide (SiO₂)
Graphite-rich schist (probable graphite ore)
Graphite schist; chiefly graphitic carbon (C) with quartz, mica, and possibly feldspar
Tumbled orange calcite
Calcite (calcium carbonate, CaCO₃)
Tumbled yellow calcite
Calcite (calcium carbonate, CaCO₃)
Raw honey calcite (probable)
Calcite, calcium carbonate (CaCO₃)
Blue calcite (probable)
Calcite, calcium carbonate (CaCO₃)
Weathered metallic-looking rock, possibly hematite-bearing ironstone
Hematite-rich ironstone; hematite Fe₂O₃, potentially with magnetite Fe₃O₄ and quartz
Sandstone
Clastic sedimentary rock (primarily quartz arenite)
Eye Agate
Chalcedony (Silicon Dioxide, SiO2)
Fluorite
Calcium Fluoride (CaF2)
Yellow Quartz
SiO2 (Silicon Dioxide)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Quartz (with iron oxide staining)
Silicon Dioxide (SiO2)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Arenite (primarily SiO2)
Sandstone
Arenite (SiO2 primarily)
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions
Pyrite
Iron Sulfide (FeS2)
Orange Calcite
Calcium Carbonate (CaCO3)
Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Shale
Clastic Sedimentary Rock
Green Fluorite
Calcium Fluoride (CaF2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Sandstone
Arenite (SiO2 primarily)
Pyrite
Iron Sulfide (FeS2)
Pyrite
Iron Sulfide (FeS2)
Pyrite
Iron Sulfide (FeS2)
Clear Quartz
Silicon Dioxide (SiO2)
Quartz Pebble (Chert/Chalcedony variety)
Silicon Dioxide (SiO2)
Rhodochrosite
Manganese Carbonate (MnCO3)
Clear Quartz Crystal
Silicon Dioxide (SiO2)
Potassium Feldspar (Orthoclase)
KAlSi3O8