Industrial Byproduct (Often Confused With Igneous Rocks Or Meteorites)

Quartz Pebble (Chalcedony/Agate variety)

Silicon Dioxide (SiO2)

Garnet (Spessartine / Almandine)

Fe3Al2(SiO4)3 to Mn3Al2(SiO4)3 (Nesosilicate)

Quartz Pebble with Iron Staining

Silicon Dioxide (SiO2) with Hematite/Limonite matrix

Quartz (Small Fragment)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Quartz (Milky or White Quartz)

Silicon Dioxide (SiO2)

Milky Quartz (Ferruginous)

Silicon Dioxide (SiO2)

Quartzite

Metamorphosed Sandstone (SiO2)

Quartz with Epidote

Silicon dioxide (SiO2) with Calcium aluminum iron silicate (Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH))

Sandstone (Banded)

Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide staining)

Magnetite

Magnetite (Fe3O4)

Agate

Silicon Dioxide (Chalcedony), SiO2

Quartz Crystal

Silicon Dioxide (SiO2)

Quartz

Silicon dioxide (SiO2)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Milky Quartz

Silicon Dioxide (SiO2)

Hypersthene

Hypersthene ((Mg,Fe)SiO3)

Carnelian

Carnelian (SiO2)

Serpentine

Antigorite-Lizardite-Chrysotile (Mg3Si2O5(OH)4)

Almandine Garnet

Almandine, Fe3Al2(SiO4)3

Quartz with Mica (Granitic / Pegmatitic Quartz)

Silicon Dioxide (SiO2) with Mica group minerals

Granite and Igneous Mix

Phaneritic Felsic to Mafic Intrusive Rocks

Granodiorite / Granite

Granodiorite (containing Quartz SiO2, Plagioclase Feldspar, and Biotite)

Quartzite

Quartzite (primarily SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Amazonite

KAlSi3O8 (Potassium Feldspar, variety of Microcline)

Graphic Granite

Graphic Granite (a variety of Pegmatite)

Basalt (Weathered)

Extrusive Igneous Rock (Mafic composition)

Milky Quartz in Matrix

Silicon Dioxide (SiO2)

Granitic Pegmatite with Schorl Tourmaline

Granitic Pegmatite (Schorl: NaFe3Al6(BO3)3Si6O18(OH)4)

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Botryoidal Chalcedony (Agate)

Silicon Dioxide (SiO2)

Magnetite Ore

Magnetite (Fe3O4)

Pumice and Scoria

Vesicular Volcanic Ejecta (Rhyolite/Andesite/Basalt)

Granitic Pegmatite with Tourmaline/Chlorite

Pegmatite

Basalt

Basalt (composition of Plagioclase feldspar and Pyroxene)

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Quartzite

Quartzite (mostly SiO2)

Serpentine

Serpentine subgroup (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

Tumbled sodalite (probable)

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂