Anthropogenic Sedimentary (Man Made)

Conglomerate

Conglomerate (clastic sedimentary rock)

Sandstone with Quartz Crystal Infill

Quartz-cemented quartz arenite

Sandstone

Sandstone (SiO2 dominated)

Dalmatian jasper

Dalmatian stone; commonly a leucocratic alkali-feldspar-rich igneous rock with arfvedsonite or aegirine inclusions

Vesicular basalt (likely amygdaloidal basalt)

Basalt, a mafic volcanic rock composed mainly of plagioclase feldspar, clinopyroxene, and commonly olivine; vesicles are partly mineral-filled amygdules.

Quartz Pebble

Silicon Dioxide (SiO2)

Chert

Microcrystalline quartz (SiO2)

Sandstone

Arenite (SiO2 principal component)

Shale (or Mudstone)

Laminose Mudrock (composition: clay minerals, quartz, and mica flakes)

Sandstone (Quartzose Sandstone)

Clastic Sedimentary Rock (primarily SiO2)

Sandstone Pebble

Arenite (SiO2 with minor mineral cements)

Sea Shell Fragment (Calcium Carbonate)

Aragonite / Calcite (CaCO3)

Sandstone (lithic wake or graywacke)

Clastic sedimentary rock (primarily quartz and lithic fragments)

Sandstone

Arenite (SiO2 primarily)

Dalmatian Jasper

Peralkaline rhyolite with arfvedsonite inclusions

Chert (Limonite-stained)

Microcrystalline Quartz (SiO2) with iron oxides

Sandstone Pebbles

Arenite (Sedimentary rock composed of sand-sized grains)

Sandstone

Arenite (SiO2 based)

Banded Sandstone (Liesegang Rings)

Arenite with Liesegang rings (SiO2/Fe2O3)

Sandstone

Arenite (primarily SiO2)

Sandstone (Ferruginous)

Arenite with Iron Oxide staining (Fe2O3)

Sandstone

Arenite (composed primarily of SiO2)

Limestone

Calcium Carbonate (CaCO3)

Glauconite (Sandstone or Shale)

Glauconite (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2

Sandstone

Clastic Sedimentary Rock (composed of SiO2 grains)

Sandstone (Quartzose)

Arenite (SiO2 based)

Sandstone

Arenite (composed primarily of SiO2)

Metaconglomerate

Metaconglomerate (Quartzite conglomerate)

Dalmatian Jasper

Peralkaline Quartz-Feldspar Rock with Arfvedsonite

Sandstone

Arenite (primarily SiO2)

Dalmation Stone

Dalmation Jasper (Igneous microcrystalline quartz with arfvedsonite)

Sandstone

Arenite

Biotite (Black Mica)

Biotite - K(Mg,Fe)3(AlSi3O10)(F,OH)2

Sandstone Pebble

Arenite (specifically Lithic or Quartz Arenite)

Sandstone (Micaceous)

Arenite (primarily SiO2 with Phyllosilicates)

Hag Stone (Piddock bored rock)

Calcareous sedimentary rock featuring Pholadidae borings

Chert (or Chalcedony)

Microcrystalline Quartz (SiO2)

Chert (Chert Nodule)

Microcrystalline quartz (SiO2)

Sandstone

Clastic Sedimentary Rock (Quartz arenite or similar)

Fossilized Shell in Limestone

Carbonate sedimentary rock with Bivalvia or Brachiopoda remains

Sandstone

Sandstone (Sedimentary rock composed of silicate grains)

Blue Agate Slice

Chalcedony (SiO2)