Sedimentary And Igneous (Mixed)

Polished sodalite-bearing rock

Likely sodalite in a feldspar-rich host; exact rock identification is uncertain from the image

Granite

Granite (Phaneritic intrusive igneous rock)

Granite (Pink/Red)

Phaneritic Igneous Rock (Rich in K-Feldspar)

K2 Jasper (K2 Granite)

Azulite in Granite (Quartz + Feldspar + Biotite + Azurite)

Mixed rough mineral specimens, likely calcite with prehnite/zeolite

Calcite (CaCO₃), with probable prehnite (Ca₂Al₂Si₃O₁₀(OH)₂) and/or zeolite-group minerals

Iron-rich sandstone or ferruginous conglomeratic sandstone

Ferruginous sandstone, primarily quartz (SiO₂) cemented or stained by iron oxides/hydroxides

Conglomeratic sandstone / breccia-like gravel rock

Polymictic conglomerate (possibly lithified gravel or concrete-like natural conglomerate)

Barite

Barium Sulfate (BaSO4)

Pink and Green Tourmaline (Tumbled)

Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4)

Conglomeratic gravel / lithified alluvial deposit

Polymictic conglomerate or pebble-rich sandstone (likely weakly cemented)

Mixed Mineral Collection (with Titanium Aura Quartz)

Silicon Dioxide (SiO2) with metallic coatings and various silicates

Tumbled granite

Granite, a coarse-grained felsic intrusive igneous rock

Weathered granite

Granite, a coarse-grained felsic intrusive igneous rock

Weathered granite pebble

Granite, a quartz–feldspar–mica plutonic rock

Blue-gray granite or granitic gneiss pebble

Granite, chiefly quartz, feldspar, and biotite/amphibole

Tumbled granite pebble

Granite, primarily quartz–feldspar–mica aggregate

Polished granite cobble

Granite, typically quartz–feldspar–biotite granite

Tumbled granite or granitic gneiss

Granite; primarily quartz, alkali feldspar, plagioclase, and mica

Coarse-grained igneous rock, likely granitic pegmatite or weathered granite

Granite/pegmatitic granite; chiefly quartz (SiO₂), feldspar, and dark mica or amphibole

Granodiorite

Phaneritic-textured Intrusive Granodiorite

Mixed Quartz and Aventurine Chips

Silicon Dioxide (SiO2) with various inclusions

Polished quartz-rich feldspar rock, possibly orbicular granite

Granite or granitic pegmatite; chiefly quartz (SiO₂), feldspar, and dark biotite/amphibole

Epidote (Unakite variety)

Epidosite (Metasomatic rock containing Ca2(Al,Fe)3(SiO4)3(OH))

Sandstone (likely Greywacke or Siltstone variety)

Arenite / Siltstone (primarily SiO2)

Conglomerate (possibly breccia/conglomeratic rock)

Polymictic conglomerate; composition and exact classification are uncertain from the image

Conglomerate

Conglomerate (Sedimentary rock containing rounded clasts)

Mixed river-worn rock collection

Uncertain; likely quartzite, sandstone, basalt, and weathered granite or gneiss

Polymict conglomerate

Clastic conglomerate, likely polymictic pebble conglomerate

Weathered limestone or calcareous concretion

Calcite-rich limestone; predominantly calcium carbonate (CaCO₃)

Lapis Lazuli (Low-grade)

Lapis Lazuli (Aggregate of Lazurite, Calcite, and Pyrite)

Fossiliferous Shale Matrix

Clastic Sedimentary Rock with Brachiopod or Mollusk shell fragments

Tumbled banded stone, likely gneiss or granite

Quartz–feldspar rock, possibly banded gneiss; exact identification requires testing

River-rounded landscaping pebbles

Mixed alluvial gravel; commonly quartzite, granite, basalt, sandstone, and quartz

Mookaite Jasper

Silicified radiolarite (SiO2)

Gravel and Pebbles

Unconsolidated rock fragments (clastic sediment)

Mookaite Jasper

Silicified Radiolarite (SiO2)

Granite

Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz, feldspar, and dark mica or amphibole

Tumbled pink granite or feldspar-rich pebble

Granite; chiefly quartz (SiO₂), feldspar, and minor mica, though the specimen may be pink orthoclase feldspar

Granite Pebble

Granite

Gabbro

Gabbro

Conglomeratic volcanic breccia

Lithic volcanic breccia, likely andesitic or basaltic

Pink Granite

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