Mixed

Mixed tumbled river pebbles and beach stones

Polymictic alluvial gravel; components include quartz, chert, jasper, sandstone, and altered volcanic rocks

Mixed rounded river pebbles, probably quartz-rich metamorphic and volcanic rocks

Predominantly quartzite/metachert, with possible rhyolite, sandstone, and iron-stained quartz; exact species cannot be determined confidently from the image

Mixed rough mineral specimens, likely quartz-bearing rocks

Probable quartz (SiO₂), with possible feldspar, iron oxides, and altered host rock

Mixed metamorphic rock fragments, likely garnet-bearing schist and quartzite

Quartz–feldspar–mica schist/quartzite; red grains may be almandine garnet

Mixed polished rock/mineral specimens

Indeterminate from image; likely quartz-bearing material with iron-oxide staining and possibly mica-rich schist

Mixed rock fragments, likely basalt and weathered granite

Probable mafic volcanic rock (basalt) with granitoid fragments; exact identification is uncertain from the image

Mixed beach pebbles; likely quartzite, granite, and iron-stained metamorphic rock

Predominantly quartzite (SiO₂), granite (quartz–feldspar–mica), and weathered iron-rich rock

Mixed rounded cobbles, likely granite and weathered volcanic rock

Granite and probable andesite/basalt clasts; exact identification is uncertain from the photograph

Mixed River Pebbles (Jasper, Hematite, and Quartzites)

Silicon dioxide (Jasper/Quartz) and Iron oxide (Hematite)

Likely amazonite-bearing pegmatite

Amazonite (green microcline feldspar, KAlSi₃O₈) with quartz and mica or other pegmatite minerals

Biotite granite (likely weathered granite)

Granite; quartz + feldspar + biotite, with accessory dark minerals

Quartz geode

Microcrystalline and crystalline quartz, SiO₂, likely with chalcedony and iron-oxide staining

Granite (Pink/Alkali Feldspar Granite)

Plutonic Igneous Rock (Granite)

Conglomerate (Greenstone/Pebble Conglomerate)

Polymictic Conglomerate

Beach cobbles, predominantly basalt with vesicular volcanic fragments

Basalt (mafic volcanic rock), with possible altered basalt and minor feldspar/quartz-bearing pebbles

Polished ruby-in-fuchsite (probable)

Corundum (Al₂O₃) with green fuchsite mica (Cr-muscovite), possibly zoisite/amphibole

Botryoidal chalcedony (likely blue-gray agate/geode material)

Microcrystalline quartz, SiO₂ (chalcedony, locally amethystine quartz)

Tumbled brown chalcedony or jasper

Microcrystalline quartz, SiO₂; likely iron-oxide-bearing chalcedony/jasper

Polished labradorite-bearing rock

Labradorite, a calcium-rich plagioclase feldspar; likely mixed with quartz and mafic minerals

Epidote in Matrix (Unakite-like Rock Fragment)

Epidote (Ca2(Al,Fe)3(SiO4)3(OH)) / Altered Metamorphic Pebble

Chert (with Epidote/Quartz veining)

Cryptocrystalline silica (SiO2) with Epidote/Quartz inclusions

Tumbled garnet-bearing rock (possible almandine garnet)

Likely almandine garnet, Fe₃Al₂(SiO₄)₃, in a dark host rock; identification is uncertain from the image alone.

Tumbled quartz-rich stone, possibly granite or rhyolite

Likely quartz (SiO₂) with feldspar and minor mica or other inclusions

Crushed granite aggregate

Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz, alkali feldspar, plagioclase, and minor mica/amphibole

Tumbled granite or granitic gneiss pebble

Granite/granitic gneiss, chiefly quartz, feldspar, and dark biotite or amphibole

Granite

Granite; primarily quartz, alkali feldspar, plagioclase, and biotite/hornblende

Slag

Ferrous slag (by-product of iron smelting)

Mixed Quartz and Jasper Pebbles

Silicon Dioxide (SiO2)

Mica-rich schist (probable)

Mica schist, likely muscovite–chlorite schist; exact minerals cannot be confirmed from the image

Mica-rich schist (likely biotite–muscovite schist)

Mica schist; composed chiefly of muscovite and/or biotite with quartz and feldspar

Red porphyritic volcanic rock, likely rhyolite or andesite

Porphyritic rhyolite–andesite; predominantly quartz/feldspar with iron-oxide staining

Amazonite in Quartz

K(AlSi3O8) - Potassium Feldspar with Quartz (SiO2)

Polished pink-and-gray stone, possibly granite or rhyolite

Probable felsic igneous rock; likely quartz–feldspar–mica aggregate, but exact identification is uncertain from the image

Ruby zoisite (anyolite) beads

Ruby-bearing zoisite; zoisite Ca₂Al₃(SiO₄)₃(OH), with corundum ruby Al₂O₃

Tumbled orbicular granite

Granite, commonly biotite–quartz–feldspar granite with orbicular or mafic enclaves

Tumbled emerald chips

Emerald, green beryl (Be₃Al₂Si₆O₁₈), colored mainly by chromium and/or vanadium

Serpentinite

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

Iron-stained quartz-rich rock, possibly ironstone or quartz-vein material

Quartz (SiO₂) with iron oxides/hydroxides; exact host rock cannot be determined from the image

Pink Granite

Granite (Felsic Plutonic Igneous Rock)

Mixed Mineral and Fossil Collection

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

River Pebbles (Mixed Lithology)

Conglomerate clasts (Silica-rich and Metamorphic assemblages)

Mixed Gemstone Beaded Jewelry

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