Quartzite rock specimen

Quartzite

Quartzite (SiO2)

metamorphic

Banded Chert (Ironstone/Jasper) rock specimen

Banded Chert (Ironstone/Jasper)

Cryptocrystalline Quartz (SiO2) with Iron Oxides

sedimentary

Jasper (Banded Argillite/Chert mix) rock specimen

Jasper (Banded Argillite/Chert mix)

Silicon Dioxide (SiO2) with iron oxide inclusions

sedimentary

Yellow Jasper rock specimen

Yellow Jasper

Jasper (Silicon Dioxide, SiO2)

sedimentary

Fluorite Tower rock specimen

Fluorite Tower

Fluorite (Calcium Fluoride - CaF2)

mineral

Banded Iron Formation (BIF) rock specimen

Banded Iron Formation (BIF)

Banded Iron Formation containing Hematite (Fe2O3) and Magnetite (Fe3O4)

sedimentary

Crazy Lace Agate rock specimen

Crazy Lace Agate

Silicon Dioxide (SiO2) with iron and aluminum inclusions

sedimentary

Chert / Jasper rock specimen

Chert / Jasper

Microcrystalline Quartz (SiO2)

sedimentary

Halite (Rock Salt) rock specimen

Halite (Rock Salt)

Halite (Sodium Chloride, NaCl)

mineral

Dendritic Jasper rock specimen

Dendritic Jasper

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

sedimentary

Quartz with Chalcopyrite and Pyrite rock specimen

Quartz with Chalcopyrite and Pyrite

Silicon Dioxide (SiO2) with Copper Iron Sulfide (CuFeS2)

mineral

Smoky Quartz and Pyrite Cluster rock specimen

Smoky Quartz and Pyrite Cluster

Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)

mineral

Septarian Nodule rock specimen

Septarian Nodule

Septarian Concretion (Calcium Carbonate/Aragonite/Calcite)

sedimentary

Heat-Treated Citrine (Amethyst) rock specimen

Heat-Treated Citrine (Amethyst)

Silicon Dioxide (SiO2) with iron impurities

mineral

Ruby in Kyanite rock specimen

Ruby in Kyanite

Corundum (Al2O3) in Kyanite (Al2SiO5)

metamorphic

Ferruginous Quartz Cobble rock specimen

Ferruginous Quartz Cobble

Silicon Dioxide (SiO2) with Iron Oxide inclusions

mineral

Blue Lace Agate rock specimen

Blue Lace Agate

Chalcedony (SiO2) with trace minerals

mineral

Fossiliferous Shale (with Vertebrate Bones) rock specimen

Fossiliferous Shale (with Vertebrate Bones)

Laminated Mudstone containing Fossilized Bone (Apatite)

sedimentary

Quartz pebble rock specimen

Quartz pebble

Silicon Dioxide (SiO2)

mineral

Quartz Pebble rock specimen

Quartz Pebble

Silicon Dioxide (SiO2)

mineral

Ferruginous Quartz rock specimen

Ferruginous Quartz

Quartz (Silicon Dioxide) - SiO2 with Iron Oxide inclusions

mineral

Bull Quartz rock specimen

Bull Quartz

Quartz (Silicon Dioxide - SiO2)

mineral

Bull Quartz (Milky Quartz) rock specimen

Bull Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

mineral

Quartz (Milk Quartz Cobble) rock specimen

Quartz (Milk Quartz Cobble)

Silicon Dioxide (SiO2)

mineral

Milky Quartz rock specimen

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

mineral

Ferruginous Quartz (Iron-stained Quartzite) rock specimen

Ferruginous Quartz (Iron-stained Quartzite)

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

metamorphic

Gneiss Pebble rock specimen

Gneiss Pebble

Gneiss

metamorphic

Ferruginous Sandstone (Iron-rich Sandstone) rock specimen

Ferruginous Sandstone (Iron-rich Sandstone)

Ferruginous Arenite

sedimentary

Diorite (Gneissic) rock specimen

Diorite (Gneissic)

Diorite

igneous

Pink Granite rock specimen

Pink Granite

Phaneritic Plutonic Felsic Rock (rich in Potassium Feldspar)

igneous

Quartzite rock specimen

Quartzite

Metamorphic rock (primarily SiO2)

metamorphic

Granite Pebble rock specimen

Granite Pebble

Felsic Plutonic Rock (primarily Quartz, Feldspar, and Mica)

igneous

Quartzite Pebble (with Iron Staining) rock specimen

Quartzite Pebble (with Iron Staining)

Quartzite (mainly SiO2)

metamorphic

Gneiss (Pebble) rock specimen

Gneiss (Pebble)

Gneiss

metamorphic

Yellow Calcite rock specimen

Yellow Calcite

Calcite (Calcium Carbonate, CaCO3)

mineral

Yellow Jasper rock specimen

Yellow Jasper

Silicon Dioxide (SiO2) - Opaque Chalcedony

sedimentary

Quartz Pebble rock specimen

Quartz Pebble

Silicon Dioxide (SiO2)

mineral

Granite rock specimen

Granite

Granite (Mainly Quartz SiO2 and Feldspar KAlSi3O8)

igneous

Granite rock specimen

Granite

Granite (composition of Quartz, Feldspar, and Mica)

igneous

Basalt rock specimen

Basalt

Extrusive mafic igneous rock

igneous

Quartzite rock specimen

Quartzite

Quartzite (primarily SiO2)

metamorphic

Quartzite with Iron Inclusions rock specimen

Quartzite with Iron Inclusions

Quartzite (primarily SiO2 with Fe2O3 impurities)

metamorphic