Hag Stone

Perforated Sedimentary Rock (typically Limestone or Sandstone)

sedimentary

Granite

Granite (Felsic Plutonic Rock)

igneous

Serpentinite (River Pebble)

Serpentinite (complex of Antigorite, Lizardite, and Chrysotile: Mg3Si2O5(OH)4)

metamorphic

Banded Chert

Microcrystalline Quartz (SiO2)

sedimentary

Serpentine

Serpentinite (group of minerals: (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)

metamorphic

Red Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

sedimentary

Jasper (likely Lake Superior Jasper)

Jasper (Silicon Dioxide, SiO2)

sedimentary

Serpentine

Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

metamorphic

Dendritic Jasper (Bumblebee like Agate)

Silicon Dioxide with inclusions (SiO2)

sedimentary

Unakite

Epidotized Granite

metamorphic

Serpentine

Serpentinite (complex of Mg, Fe, Ni, Al, Zn, Mn)Si2O5(OH)4

metamorphic

Quartzite

Quartzite (primarily SiO2)

metamorphic

Ferruginous Chert (Jasper)

Silicon Dioxide (SiO2) with iron oxide inclusions

sedimentary

Riverstone Quartzite

Quartzite (primarily SiO2)

metamorphic

River Stone (River Pebbles)

Alluvial Deposit (typically Quartzite, Sandstone, or Granite clasts)

sedimentary

Quartzite (River Pebble)

Quartzite (primarily SiO2)

metamorphic

Granite

Granite

igneous

Basalt

Basalt (Mafic Aphanitic Igneous Rock)

igneous

Yellow Quartzite (River Pebble)

Quartzite (primarily Silicon Dioxide, SiO2)

metamorphic

Quartzite (River Cobble)

Quartzite (mostly SiO2)

metamorphic

Sandstone (Quartzose Sandstone)

Clastic sedimentary rock (primarily SiO2)

sedimentary

Chert (specifically Jasper/Carnelian Agate)

Microcrystalline Quartz (SiO2)

sedimentary

Sandstone (Ferruginous)

Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)

sedimentary

Emerald / Green Beryl

Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities

mineral

Chert (specifically Yellow/Tan Chert)

Silicon Dioxide (SiO2)

sedimentary

Sandstone (Quartzite texture)

Arenite (SiO2 secondary)

sedimentary

Fossilized Coral (Petoskey Stone or similar)

Hexagonaria percarinata (Order: Rugosa)

sedimentary

Sandstone (River Cobble)

Arenite

sedimentary

Ironstone Concretion (Limonite/Goethite)

Goethite-rich Concretion (FeO(OH))

sedimentary

Agate

Agate (Silicon Dioxide, SiO2)

mineral

Sandstone (Grooved/Weathered)

Arenite (composed primarily of Quartz and Lithic fragments)

sedimentary

Sandstone

Arenite (SiO2 principal)

sedimentary

Carnelian Agate (with Quartz/Chalcedony)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

mineral

Smoky Quartz

Silicon Dioxide (SiO₂)

mineral

Chlorite Included Quartz

Silicon Dioxide (SiO2) with Chlorite (Mg,Fe,Li)6AlSi3O10(OH)8

mineral

Kyanite in Quartz

Kyanite (Al2SiO5) with Quartz (SiO2)

metamorphic

Kyanite in Quartz

Kyanite (Al2SiO5) with Quartz (SiO2) matrix

metamorphic

Milky Quartz

Silicon Dioxide (SiO2)

mineral

Quartz Pebble (Milky Quartz)

Silicon Dioxide (SiO2)

mineral

Moonstone

Orthoclase Feldspar (KAlSi3O8)

mineral

Jasper (with Agate/Chalcedony inclusions)

Silicon Dioxide (SiO2)

sedimentary

Golden Quartz / Iron-stained Quartz

Silicon Dioxide (SiO2) with iron oxide inclusions (Goethite or Limonite)

mineral