Mixed (Sedimentary, Igneous, And Metamorphic)

Unakite

Epidotized Granite

Metallic sulfide mineral specimen, likely pyrite

Pyrite (FeS₂), possibly a pyrite-rich sulfide aggregate

Pyrite-bearing sulfide specimen

Pyrite (FeS₂), possibly with chalcopyrite (CuFeS₂) and/or marcasite

Unidentified gravel and stone fragments

Mixed, indeterminate lithologies; likely quartz, feldspar, and weathered silicate rock fragments

River Pebbles (including Granite and Basalt)

Mixed Igneous Rocks (Granite, Basalt)

Concrete Fragment

Artificial Conglomerate (Cement and Aggregate)

Mahogany Obsidian

Volcanic Glass with Hematite/Magnetite inclusions (SiO2 + Fe2O3)

Soil with Mineral Detritus and Quartz Fragments

Regolith / Silicate Mineral Aggregate

Pink Granite

Granite (Felsic Plutonic Rock)

Mixed small mineral specimens

Likely quartz varieties with possible rose quartz and iron-stained quartz; exact identification is uncertain from the blurred image

Sodalite

Na4Al3(SiO4)3Cl (Sodium Aluminum Silicate Chloride)

Unakite

Unakite (Epidotized Granite)

Mixed Gravel and Pebbles

Polylithic Alluvial Aggregate

Asphalt

Asphalt concrete

Biotite-bearing mica schist (probable)

Mica schist, chiefly quartz + muscovite/biotite; composition is uncertain from the photograph

Sodalite

Sodalite (Na8Al6Si6O24Cl2)

Caribbean Calcite

Calcite (CaCO3) with Aragonite (CaCO3)

Unakite

Epidotized Granite

Unakite

Unakite (Epidotized Granite)

Pink Granite

Phaneritic Felsic Intrusive Igneous Rock

Mixed Gemstone and Mineral Collection

Mixed Silica and Carbonate minerals (SiO2, CaSO4·2H2O, etc.)

Rounded river pebbles, likely basalt and sandstone/conglomerate

Probable basalt (dark specimen) and ferruginous sandstone or weathered conglomerate (tan specimen)

Asphalt (Bituminous Rock)

Natural bitumen or Bituminous limestone/sandstone

Polished ruby-in-fuchsite (tentative)

Fuchsite mica with corundum (ruby), commonly in quartzite or mica schist

Smoky Quartz and Orthoclase Feldspar

Granitic Pegmatite (SiO2 + KAlSi3O8)

Feldspar-Quartz Rock (likely Pegmatite or Granite)

Feldspar-Quartz composite rock (KAlSi3O8 - SiO2)

Granite Pebble

Granite (composed of Quartz, Feldspar, and Mica)

Mixed Mineral Collection (Quartz, Amethyst, Rose Quartz, Pyrite, etc.)

Mixed Silicates and Sulfides (SiO2, FeS2)

Copper Ore (Malachite and Limonite bearing)

Cuprite, Malachite, and Limonite mixture

Mixed rock and mineral specimens

Predominantly quartz-rich rocks, with a possible malachite-bearing specimen; exact identification is uncertain from the image

Pink granite fragment

Granite, chiefly quartz, feldspar, and mica

Quartz-rich pegmatite specimen

Hydrothermal/pegmatitic quartz aggregate, chiefly SiO₂, with probable feldspar and mica/accessory sulfides

Lapis Lazuli

Lapis lazuli (complex rock composed of Lazurite, Calcite, and Pyrite)

Unakite

Unakite (Metasomatized Granodiorite)

Jasper / Agate

Silicon dioxide (SiO2)

Mixed river-worn rock collection

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

Unakite

Epidotized Granite

Unakite

Epidotized Granite

Graphite

Graphite (Carbon, C)

Mixed rock fragments, likely granite and weathered metamorphic rock

Granite (quartz–feldspar–mica aggregate) with probable schist/gneiss fragments

Granite

Felsic intrusive igneous rock

River Pebble

Polished Quartzite or Mixed Lithology