Sedimentary (Physico Chemical Precipitate)

Garnet

Garnet Group (complex nesosilicates with general formula X3Y2(SiO4)3, where X can be Ca, Mg, Fe2+, Mn2+ and Y can be Al, Fe3+, Cr3+, V3+)

Jade (Nephrite or Jadeite)

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)

Satin Spar (Selenite)

Gypsum (CaSO4·2H2O)

Puddingstone (Gowganda Tillite/Lorrain Quartzite)

Jasper Conglomerate

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

Sandstone

Quartz Sandstone (predominantly)

Shale creek bed

Shale (fine-grained clastic sedimentary rock)

Sandstone (likely Arkosic)

Clastic Sedimentary Rock

Hag Stone

Perforated Sedimentary Rock

Sandstone Cobble

Clastic Sedimentary (Sandstone)

Breciated Limestone with Calcite Veins

Sedimentary Breccia (CaCO3)

Shale or Siltstone

Sedimentary Rock (Siliciclastic)

Sandstone (likely Siltstone or fine-grained Sandstone)

Sedimentary Rock (Clastic)

Conglomerate

Clastic Sedimentary (Conglomerate)

Limestone Breccia

Sedimentary Breccia (Calcareous)

Siltstone or Mudstone

Argillaceous sedimentary rock

Hag Stone

Siltstone or Fine-grained Sandstone with boring (e.g., Lithophaga impact)

Sandstone or Quartzite

Arenite (if sedimentary) / Quartzite (if metamorphic)

Calcite (or Alabaster, if truly carved)

Calcium Carbonate (CaCO3)

Conglomerate (Red Sandstone variety)

Clastic Sedimentary Rock (Conglomeratic Sandstone)

Septarian Nodule (Septarian Dragon Stone)

Septarian Concretion (Composition: Calcite, Aragonite, and Limestone/Clay)

Sandstone (Ferruginous)

Sandstone (primarily SiO2 with Iron Oxide cement)

Blue Calcite

Calcium Carbonate (CaCO3)

Orange Calcite (likely polished specimen)

Calcite

Pyrite

Iron Disulfide (FeS2)

Basalt (Water-worn Pebble)

Basalt (Mafic Extrusive Igneous Rock)

Sedimentary rock with quartz veining

Laminated siltstone or mudstone with hydrothermal quartz veins

Sedimentary Sandstone (Sandstone Slab)

Arenite (SiO2 with Fe2O3 staining)

Fossil Shell in Sedimentary Matrix

Bivalvia (fossil) in Calcium Carbonate Matrix

Red Jasper

Silicon Dioxide with Hematite impurities (SiO2 + Fe2O3)

Fossilized Fish (Lepidotes)

Lepidotes sp. (Order: Lepisosteiformes)

Chalk / Sedimentary Limestone

Calcium Carbonate (CaCO3) - Biogenic Sedimentary Rock

Chalk (Sedimentary Limestone)

Calcium Carbonate (CaCO3) - Bioclastic Limestone

Sandstone

Arenite (primarily SiO2)

Fossilized Bivalve Shell

Bivalvia (fossil specimen)

Concretion (Sandstone)

Sandstone Concretion

Rose Quartz

SiO2 (Silicon Dioxide)

Ironstone Concretion / Limonite-stained Siltstone

Ironstone (primarily Limonite FeO(OH)·nH2O and Siltstone)

Jasper

Jasper (Silicon Dioxide, SiO2)

Red Jasper

Jasper (Silicon Dioxide, SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with iron impurities

Red Jasper (Tumbled)

Silicon Dioxide (SiO2) with iron oxide inclusions