Igneous Or Sedimentary (Anthropogenic Modification)

Greenstone with Epidote or Quartz Vein

Epidiorite or Metabasalt (composed largely of Chlorite, Epidote, and Amphibole)

Red Jasper

Silicon Dioxide with Hematite impurities (SiO2 + Fe2O3)

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

Pegmatite (Granitic) with Tourmaline

Granitic Pegmatite (containing Schorl and Quartz)

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

Granite

Granite (a common rock type, not a single mineral species)

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

Blue Topaz (facetted in jewelry)

Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)

Granite

Granite (Felsic intrusive igneous rock)

Sandstone

Arenite (Sedimentary Rock)

Granite

Granite (Phaneritic Quartz-Feldspar Felsic Rock)

Conglomerate

Conglomerative Sedimentary Rock

Conglomerate (or Breccia)

Clastic Sedimentary Rock

Sandstone (likely Graywacke or Lithic Sandstone)

Clastic Sedimentary Rock

Limestone

Sedimentary Calcite (CaCO3)

Conglomerate

Conglomerate (Sedimentary rock)

River Pebble (Siltstone/Mudstone)

Clastic sedimentary rock

River Rock (likely Siltstone or fine-grained Sandstone)

Clastic Sedimentary Rock

Conglomerate

Clastic sedimentary conglomerate

Shale

Lutaceous Sedimentary Rock

Sodalite

Na8(Al6Si6O24)Cl2

Milky Quartz

Silicon Dioxide (SiO2)

Eudialyte in Matrix

Eudialyte [Na15Ca6(Fe,Mn)3Zr3(Si25O73)(O,OH,H2O)3(Cl,OH)2]

Spinel

Magnesium Aluminum Oxide (MgAl2O4)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Rose Quartz

Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Labradorite

Labradorite (a calcium-enriched feldspar mineral), (Ca, Na)(Al, Si)4O8

Carnelian (Orange Chalcedony)

Silicon dioxide (SiO2)

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

White Topaz

Al2SiO4(F,OH)2 (Aluminium Silicate Fluoride Hydroxide)

Schorl (Black Tourmaline)

NaFe3Al6(BO3)3Si6O18(OH)4 (Sodium Iron Aluminum Borosilicate)