Mixed (Igneous, Sedimentary, Metamorphic, And Minerals)

Mineral and Rock Collection (Assorted)

Mixed collection including Quartz (SiO2), Jasper (SiO2 with impurities), Rose Quartz, and Aventurine

Mixed rock and mineral specimens

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

Quartz with impurities or Host Rock

SiO2 (Silicon Dioxide) with mixed silicates

Unidentified weathered rock fragments

Likely mixed silicate rocks; specific identification requires testing

Mixed Mineral Bead Bracelet

Polycrystalline and Monocrystalline Silicates/Oxides (Quartz, Howlite, Hematite)

Quartz and Mixed Sedimentary Rocks

Silicon Dioxide (SiO2) mixed with various clastic sedimentary lithologies

Coarse-grained granite

Granite, composed chiefly of quartz, potassium feldspar, plagioclase, and biotite/hornblende

Granite / Feldspar gravel

Granite (felsic intrusive igneous rock)

Mixed river gravel (alluvial conglomeratic sediment)

Polymictic alluvium; composition includes quartz, feldspar, chert, granite, basalt, and metamorphic rock fragments

Beach Pebbles and Quartz Aggregates

Quartz pebbles and biogenic fragments (SiO2, CaCO3)

Black Tourmaline

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

Likely quartz-bearing metamorphic pebble

Indeterminate; probable quartzite or quartz-rich gneiss with dark mica/amphibole

Milky quartz rough chips

Quartz (silicon dioxide, SiO₂)

Serpentinite

Serpentinite (composed mainly of serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Diorite

Diorite (plutonic igneous rock)

Mica-bearing metamorphic rock, likely schist

Muscovite–biotite schist, possibly phyllite

Mixed rounded gravel and weathered rock fragments

Polymictic alluvial or glacial gravel; composition appears to include basaltic, quartz-rich, and feldspathic clasts

Natural gemstone and mineral collection

Mixed specimens, including turquoise, tiger’s eye, amethyst, fluorite, pyrite, garnet, rose quartz, lapis lazuli, obsidian, rhodonite, red corundum, labradorite, calcite, lepidolite, sodalite, apatite, and others

Ptygmatic Migmatite

Migmatite (consisting of Neosome and Paleosome fractions)

Magnetite (Lodestone variety)

Magnetite (Fe3O4)

Unakite

Unakite (altered granite)

Mixed Gemstone Beaded Jewelry

Various minerals (e.g., Quartz varieties like Rose Quartz, Amethyst; Peridot; Garnet; etc.)

Granite Pebble

Intrusive Igneous Rock (Granite)

Mixed rock fragments, likely granite and weathered metamorphic rock

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

Mixed Gemstone and Mineral Collection

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

Milky quartz

Quartz (silicon dioxide, SiO₂)

Mahogany Obsidian

Volcanic glass containing Magnetite/Hematite

Chakra Crystal Bracelet

Mixed Mineral Assortment

Banded River Cobble with Mafic Dike

Hydrothermally altered Graywacke or Sandstone with Mafic Intrusion

Conglomeratic sandstone / breccia-like gravel rock

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

Mixed river stones and gravel

Polymictic alluvial clasts; individual pieces may include quartzite, granite, basalt, sandstone, limestone, and slate

Small quartz-rich mineral fragment

Quartz (SiO₂), possibly milky or chalcedonic quartz

Quartz pebble

Silicon dioxide (SiO2)

Pink and Green Tourmaline (Tumbled)

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

Garnet, likely almandine–spessartine

Garnet-group nesosilicate; commonly almandine Fe₃Al₂(SiO₄)₃ or spessartine Mn₃Al₂(SiO₄)₃

Greenstone / Diorite

Intermediate plutonic igneous rock

Iron-rich concretion or weathered limonite/goethite nodule

Limonite (hydrous iron oxides), commonly dominated by goethite (FeO(OH))

Granodiorite

Intermediate Phaneritic Plutonic Rock

Rough Gemstone Grains (Mixed Sapphires and Quartz)

Corundum (Al2O3) and Quartz (SiO2)

Mixed Mineral and Fossil Collection

Multi-specimen assemblage (SiO2, CaCO3, FeS2, etc.)

Mixed Gemstones and Minerals

Mixed Silicates and Oxides (Quartz/Amethyst, Aventurine, Sodalite, Chert, Jasper)