Granite
Felsic intrusive igneous rock
igneous
Category
Man Made Rock (Technosol)
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Granite
Felsic intrusive igneous rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Gneiss
Gneiss (a metamorphic rock)
Metamorphic
Basalt River Stone
Extrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Small pale rock fragment
Indeterminate; possibly quartz, calcite, or a weathered feldspar-rich fragment
mineral
Quartz (on matrix)
Quartz (Silicon Dioxide, SiO₂)
Mineral
Ferruginous Sandstone (Ironstone Nodules)
Ferruginous Quartz-Arenite (with Goethite/Hematite cement)
sedimentary
Massive Quartz (Milky or Gray)
Silicon Dioxide (SiO2)
mineral
Red Sandstone Pebble
Sedimentary quartz sandstone
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Red Granite Pebble
Intrusive Felsic Igneous Rock (Granite)
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Fossiliferous Sandstone / Quartzite Pebble
Sedimentary rock with skeletal fragments (e.g., Paleozoic crinoid/brachiopod fossils)
fossil
Sandstone
Arenite (SiO2 based typically)
sedimentary
Granite Pebble
Granite (composition of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Note: No specimen visible
N/A
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Basalt with Quartz Veins
Basalt (complex silicate) with Quartz (SiO2) intrusions
igneous
River Rock (Basalt or Sandstone)
Clastic Sedimentary Rock or Extrusive Mafic Igneous Rock
igneous or sedimentary
Asphalt (Bituminous Slate/Sandstone)
Asphaltum / Bituminous Rock
sedimentary
Cockle Shell Fossil
Cardiidae family (Bivalvia)
fossil
Cannonball Concretion
Calcite-cemented Sandstone Concretion
sedimentary
Fossil Brachiopod or Mollusk Cast
Phylum Brachiopoda / Mollusca internal mold
fossil
Sandstone Pebble
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Basalt Pebble
Extrusive Igneous Rock
igneous
Seashell Fossil
Gastropoda fossil
fossil
Basalt
Extrusive Igneous Rock
igneous
Basalt Pebble
Extrusive Igneous Rock
igneous
Basalt Pebble
Extrusive igneous rock
igneous
Basalt Pebble
Extrusive igneous rock
igneous
Vesicular Basalt (River Rock)
Afanitic Vesicular Basalt
igneous
Granite
Intrusive Igneous Rock
igneous
Leopard jasper (orbicular jasper)
Silicified volcanic rock, chiefly microcrystalline quartz/chalcedony (SiO₂) with feldspar and iron-oxide inclusions
metamorphic
Quartzite (Iron-stained)
Quartzite (SiO2 with Fe2O3 staining)
metamorphic
Chert (Nodule)
Microcrystalline or Cryptocrystalline Silica (SiO2)
sedimentary
Chert Breccia (Yellow Jasper)
Silicon Dioxide (SiO2) - Brecciated Chert
sedimentary