Industrial Byproduct (Often Confused With Igneous Rocks Or Meteorites)

Fuchsite (Chrome Mica)

K(Al,Cr)2(AlSi3O10)(OH)2

Tektite (Indochinite)

Tektite (High-silica amorphous glass)

Quartz Geode

Silicon dioxide (SiO2)

Milky or Greenish Quartz Pebble

Silicon Dioxide (SiO2)

Polished blue stone, likely sodalite or dyed agate

Sodalite: Na₈(Al₆Si₆O₂₄)Cl₂; exact identification requires testing

Blue Sapphire (likely costume glass imitation)

Corundum (Al2O3) with iron/titanium impurities

Fluorite

Fluorite (Calcium Fluoride, CaF2)

Scoria (Lava Rock)

Scoria (Mafic Volcanic Rock)

Gold Nugget

Native Gold (Au)

White Agate (Chalcedony)

Silicon Dioxide (SiO2)

Magnetite

Magnetite (Fe3O4)

Polygenetic Breccia

Clastic Breccia (containing lithic fragments in a fine-grained matrix)

Epidote-bearing Rock / Epidote Inclusion

Epidote (Ca2(Al, Fe)3(SiO4)3(OH)) in host rock

Amazonite

Amazonite (KAlSi3O8)

Black Sapphire

Corundum (Al2O3)

Tumbled sodalite

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂

Sapphire

Corundum (Al2O3)

Smoky Quartz

Smoky Quartz (SiO2 - Silicon Dioxide with trace impurities of aluminum)

Blue chalcedony (likely common blue agate)

Microcrystalline quartz, SiO₂; chalcedony variety

Tumbled green aventurine

Quartzite dominated by quartz (SiO₂), with green mica/fuchsite inclusions

Black Tourmaline

Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe3Al6(BO3)3Si6O18(OH)4

Quartz River Pebbles

Silicon Dioxide (SiO2)

Granite

Granite (Phaneritic Quartz-Feldspar rock)

Citrine

Quartz (SiO2) - variety Citrine

Mica Sand / Vermiculite

Phyllosilicate group (typically Biotite or Muscovite)

Amethyst Quartz

SiO2 (Silicon Dioxide)

Tektite

Tektite (Amorphous silica rich glass)

Garnet

Almandine/Pyrope Garnet (Silicate Mineral Group)

Chalcedony (Agate)

Cryptocrystalline Quartz (SiO2)

Scoria

Scoriaceous Basalt

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Quartz Crystal (Geode Fragment)

Silicon Dioxide (SiO2)

Green Aventurine

SiO2 (Silicon Dioxide) with Fuchsite inclusions

Milky quartz vein fragment

Quartz, silicon dioxide (SiO₂)

Scoria

Scoria (a vesicular basalt or andesite)

River Quartz Pitting/Cobble

Silicon Dioxide (SiO2)

Quartz (vein quartz)

SiO2 (Silicon Dioxide)

Muscovite Mica

KAl2(AlSi3O10)(OH)2

Almandine Garnet

Almandine, Fe3Al2(SiO4)3

Rough Topaz

Aluminum silicate fluoride hydroxide [Al2SiO4(F, OH)2]

Milky quartz (rough quartz fragment)

Quartz, silicon dioxide (SiO₂)

Almandine Garnet

Almandine (Fe3Al2(SiO4)3)