Industrial Byproduct (Often Confused With Igneous Rocks Or Meteorites)

Basalt with Vesicular Texture

Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Basalt

Basalt (Mafic volcanic rock)

Quartzite Breccia

Brecciated Quartzite (SiO2)

Garnet in Quartz Matrix

Almandine Garnet (Fe3Al2(SiO4)3) in Quartz (SiO2)

Serpentinite

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

Colorless faceted gemstone, likely cubic zirconia

Cubic zirconia (synthetic ZrO₂), possibly glass or quartz

Mica (Muscovite)

Muscovite, KAl2(AlSi3O10)(OH)2

Ferruginous Quartz

Silicon Dioxide (SiO2) with iron oxide inclusions (Limonite/Hematite)

Quartzite

Quartzite (SiO2)

Sandstone (Ferruginous)

Arenite with Iron-Oxide Cement

Garnet (likely Almandine or a blend)

Garnet group: X3Y2(SiO4)3, where X can be Ca, Mg, Fe2+, Mn2+ and Y can be Al, Fe3+, Cr3+. Given the dark, somewhat reddish-brown appearance in the image, it's likely Almandine (Fe3Al2(SiO4)3) or a mix with other iron-rich garnets.

Jasper containing Agate (Jaspagate)

Silicon Dioxide (SiO2)

Vesicular Basalt

Basalt (a mafic extrusive igneous rock)

Quartzite

Quartzite (primarily SiO2)

Micaceous Rock (likely Muscovite Schist/Gneiss or a Muscovite-rich Specimen)

Predominantly Muscovite (KAl2(AlSi3O10)(F,OH)2), often found in rocks like Muscovite Schist or Muscovite Gneiss.

Amethyst

SiO2 (Silicon Dioxide) - a variety of Quartz

Gneiss

Gneiss

Red Sandstone

Ferruginous Sandstone (SiO2 + Fe2O3)

Rough Diamond (or Quartz Crystal)

Carbon (C) [if Diamond] / Silicon Dioxide (SiO2) [if Quartz]

Greenish translucent mineral fragment

Indeterminate; possibly serpentine, epidote, or green glassy feldspar

Granodiorite

Granodiorite (Intermediate intrusive igneous rock)

Serpentine

Serpentinite (a rock composed primarily of serpentine minerals like antigorite, chrysotile, and lizardite; general formula (Mg, Fe)3Si2O5(OH)4)

Quartz with Mica (Micaceous Quartz)

Silicon Dioxide (SiO2) with Phyllosilicates

Sodalite

Sodalite [Na8(Al6Si6O24)Cl2]

Stilbite

Stilbite-Ca (NaCa4(Si27Al9)O72·28H2O)

Granite or Pegmatite in host rock

Granitoid / Felsic Intrusive Rock

Honey Calcite

Calcium Carbonate (CaCO3)

Amazonite

Amazonite (KAlSi3O8)

Banded Agate

Silicon Dioxide (SiO2) - Variety of Chalcedony

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

Quartzite

Quartzite (composed primarily of Silica, SiO2)

Quartz (Druzy)

Silicon Dioxide (SiO2)

Almandine Garnet

Almandine, Fe3Al2(SiO4)3

Yellow Chalcedony (Agate)

Silicon Dioxide (SiO2)

Chalcedony (Agate Pebble)

Silicon Dioxide (SiO2)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (SiO2)

Chert (and Chalcedony/Agate mixture)

Microcrystalline Quartz (SiO2)

Quartz (Peach/Orange variety)

Silicon Dioxide (SiO2)

Oolitic Ironstone

Sedimentary Ooidal Ironstone (Limonite/Hematite mixture)

Quartz (Milky Quartz / Greenish Quartz)

SiO2 (Silicon Dioxide)