Sedimentary Rock (Possibly Conglomerate Or Breccia With A Quartz Vein)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Tumbled pegmatitic granite

Coarse-grained granite/pegmatite, chiefly quartz, feldspar, and biotite or amphibole

Quartz Vein / Milky Quartz

Silicon Dioxide (SiO2)

Likely weathered quartz-bearing rock (uncertain identification)

Possibly quartz-rich granite or granitic aplite; exact identification requires a clearer, larger image and tests

Garnet-bearing Schist / Conglomerate Specimen

Metamorphic rock with almandine garnet porphyroblasts

Iron-stained Quartz Vein

Silicon Dioxide (SiO2) with Limonite/Hematite inclusions

Quartz with Chalcedony

Silicon dioxide (SiO2)

Milky quartz–rich rock

Quartz (SiO₂), likely massive milky quartz with minor dark inclusions

Quartz-rich pegmatite (possibly quartz–feldspar rock)

Granite pegmatite; chiefly quartz (SiO₂) with feldspar and minor mica/iron staining

Garnet Schist

Almandine Garnet in Mica Schist

Mica-rich metamorphic rock, likely schist

Muscovite–biotite schist, possibly with quartz and feldspar

Granite featuring Quartz Vein

Phaneritic Felsic Igneous Rock (Quartz, Orthoclase Feldspar, Mica)

Gneiss

Feldspathic biotite gneiss; a high-grade metamorphic rock composed mainly of quartz, feldspar, and mica

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartzite Pebble (with Quartz Vein)

Meta-quartzite (SiO2-dominated metamorphic rock)

Clear Quartz

Silicon dioxide (SiO2)

Quartz Crystal Point

Silicon Dioxide (SiO2)

Chert or flint nodule

Microcrystalline quartz (SiO₂), likely chalcedony-rich chert

Basalt with Quartz Vein

Aphanitic Mafic Igneous Rock with Silicon Dioxide (SiO2) inclusion

Milky quartz-rich rock

Quartz (SiO₂), likely massive milky quartz with minor iron-oxide staining and attached host material

General Gravel (River Rock/River Stones)

Mixed Lithic Sediments (Conglomerate Clasts)

Chert (specifically Flint or Dark Chert)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Pink Granite

Granite (Felsic intrusive igneous rock)

Fossiliferous Shale or Slate with Plant Fossils

Fossil-bearing argillaceous rock

Quartz (Microcrystalline variety)

Silicon Dioxide (SiO2)

Chert (with Quartz Vein)

Microcrystalline silica (SiO2)

Quartz-veined Sandstone Pebble

Quartzose Sandstone with Quartz Veinlets

Massive Quartz

Silicon Dioxide (SiO2)

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Porous quartz-rich rock, likely weathered rhyolite or silicified volcanic breccia

Rhyolite or volcanic breccia; predominantly microcrystalline quartz (SiO₂) with altered feldspar and iron oxides

Basalt with Epidote/Quartz Vein

Mafic Volcanic Rock with Hydrothermal Veining

Quartz with Feldspar

Silicon Dioxide (SiO2) with Potassium Feldspar (KAlSi3O8)

Dragon Vein Agate

Chalcedony (Quartz) - SiO2

Basalt with Quartz/Calcite Veining

Basalt (principally Plagioclase and Pyroxene)

Chert (or possibly Flint)

SiO2 (Silicon Dioxide)

Quartz-veined Sedimentary Rock

Sedimentary rock with hydrothermal quartz veins

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Fluorite in Matrix

Fluorite (CaF2) within a host rock matrix

Granite, possibly granodiorite

Coarse-grained felsic plutonic rock; chiefly quartz (SiO₂), potassium feldspar and plagioclase feldspar, with biotite and/or hornblende

Rutilated Quartz (or possibly Tourmalinated Quartz, White Rutile)

SiO2 with TiO2 inclusions

Likely porphyritic igneous rock (possibly granite or rhyolite)

Quartz–feldspar–mica aggregate; exact identification requires a fresh surface and tests

Pegmatitic granite, possibly potassium-feldspar-rich

Coarse-grained granite; mainly quartz (SiO₂), potassium feldspar (KAlSi₃O₈), plagioclase, and biotite/hornblende