Mixed (Predominantly Sedimentary And Igneous)

K-feldspar Granite / Red Granite Fragment

Alkali feldspar granite (Plutonic igneous rock)

Carnelian (Carnelian Agate)

Carnelian (Silicon Dioxide - SiO2)

Granite Pebble

Intrusive Igneous Rock (Granite)

Greenstone / Diorite

Intermediate plutonic igneous rock

Mixed rounded beach gravel

Polymictic alluvial or beach clasts, likely including quartzite, limestone, granite, and other silicate rocks

Diorite

Diorite (plutonic igneous rock)

Mixed Crushed Stone

Aggregate (varied mineral composition)

Conglomerate

Sedimentary Conglomerate

Conglomerate

Conglomerate

Granite (Pink/Potassium Feldspar rich)

Granite (K-feldspar rich intrusive igneous rock)

Granite / Feldspar gravel

Granite (felsic intrusive igneous rock)

Weathered brown sandstone or quartzite cobble

Indeterminate sandstone; possibly quartz-rich quartzite

Mixed gemstone specimens

Likely pink sapphire or tourmaline, red garnet, blue sapphire, precious opal, and green tourmaline/emerald; exact identities cannot be confirmed from the collage

Graphite

Graphite (Carbon, C)

Carnelian

Carnelian (a variety of Chalcedony); SiO2 (Silicon Dioxide)

Pink Granite

Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Mica)

Black Tourmaline

Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)

Gravelly, weathered sediment (likely glacial till)

Unconsolidated diamicton; mixed lithologies, commonly including quartz, feldspar, and weathered silicate rock fragments

Quartz with Iron Staining

Silicon Dioxide (SiO2) with Hematite/Limonite inclusions

Conglomerate

Conglomeratic Sandstone

Quartz-rich feldspar rock, possibly pegmatitic granite

Granite or granitic pegmatite; mainly quartz (SiO₂) and feldspar, with possible mica

Dalmatian Stone

Dalmatian Jasper (a misnomer) / Perthitic Igneous Rock

Conglomeratic sandstone or breccia specimen

Quartz-rich clastic sedimentary rock; likely sandstone with pebble-sized quartz, feldspar, and lithic clasts

Mixed tumbled gravel and quartz-rich sandstone

Primarily quartz (SiO₂), feldspar, and lithic sedimentary fragments; one piece appears to be quartz-rich sandstone

Likely gabbro or diabase

Mafic igneous rock, chiefly plagioclase feldspar and pyroxene; possible olivine and amphibole

Likely weathered granite or granitic gneiss

Granite: quartz + feldspar + mica; possibly gneiss if the faint banding is structural

Granite Pebble (Pegmatitic Quartz-Feldspar River Rock)

Granite / Quartz-Feldspar-Mica Aggregate

Red Granite

Granite (Felsic Plutonic Rock)

Jasp-Agate

Cryptocrystalline Quartz (SiO2) with Iron Oxide inclusions

Mixed collection of common river stones

Varied lithologies, visibly including quartz-rich rock, dark mafic rock, sandstone, and purple quartz-bearing material

Likely weathered granite or granitic rock

Granite; quartz + feldspar + mica, compositionally variable

Granite pebble

Coarse-grained granitic rock, primarily quartz–feldspar–biotite

Granodiorite

Intermediate Phaneritic Plutonic Rock

Granite

Granite (Felsic Plutonic Rock)

Landscaping stones

Unidentified natural fieldstones, possibly granite, gneiss, quartzite, and limestone

Granite

Felsic intrusive igneous rock

Unidentified polished stone fragments

Indeterminate; likely mixed lapidary specimens, possibly jasper, agate, or quartz-bearing rock

Polygenetic Conglomerate (Puddingstone)

Conglomerate (SiO2 matrix with mixed clasts)

Gossan (Iron Cap)

Limonitic Gossan (Fe2O3·nH2O mixed)

Mixed river pebbles (gravel)

Polymictic alluvial gravel; diverse clasts, likely including quartz, feldspar-rich granitoids, and metamorphic rocks

Gravel and Pavement Aggregates

Unconsolidated rock fragments / detrital sediments

Opal

Hydrated Silica (SiO2·nH2O)