Mineral With Metamorphic Or Sedimentary Host

Green Aventurine

Aventurine Quartz (SiO2)

Orthoclase Feldspar (Twinning Specimen)

Orthoclase (KAlSi3O8)

Quartzite

Quartzite (SiO2)

Marble

Recrystallized Calcite (CaCO3)

Rutilated Quartz (with Garnet pendant)

Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions

Schist

Mica Schist (Composition typically involves Muscovite, Biotite, Quartz, and Feldspar)

Alexandrite

Chrysoberyl (BeAl2O4 with Chromium impurities)

Milky Quartz

Silicon Dioxide (SiO2)

Amazonite

KAlSi3O8 (Potassium aluminum silicate - blue-green variety of Microcline)

Lapis Lazuli

Na8(Al6Si6O24)S2 (Lazurite is the primary constituent mineral)

Wavellite

Wavellite (Al3(PO4)2(OH, F)3·5H2O)

Banded Agate

Cryptocrystalline variety of Quartz (SiO2)

Aventurine

Silicon Dioxide (SiO2) with inclusions

Pyrite

Iron Sulfide (FeS2)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Quartzite with Chlorite/Epidote

Metamorphosed Quartzite (SiO2)

Sandstone (with man-made markings)

Arenite (composed primarily of Quartz, SiO2)

Greenschist (Greenstone)

Greenschist

Labradorite

Labradorite (a calcium-enriched feldspar mineral), (Ca, Na)(Al, Si)4O8

Banded Chert / Banded Jasper (likely a variety of Chert/Chalcedony)

Chert (microcrystalline quartz)

Blue Quartzite (Dyed)

Silicon Dioxide (SiO2) with inclusions

Agate

Cryptocrystalline quartz (SiO2)

Feldspar (specifically Orthoclase)

Potassium Aluminum Silicate (KAlSi3O8)

Rhodonite

Manganese silicate (Mn,Fe,Mg,Ca)SiO3

Rhodonite

Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3

Native Gold Nugget

Native Gold (Au)

Yellow Quartz

Silicon Dioxide (SiO2)

Galena

Lead(II) sulfide (PbS)

Arsenopyrite

Arsenopyrite (FeAsS)

Aquamarine with Ruby Accent

Beryllium Aluminum Silicate (Be3Al2Si6O18) with Aluminum Oxide (Al2O3)

Muscovite Mica

KAl2(AlSi3O10)(F,OH)2

Black Star Diopside (beads)

Diopside (CaMgSi2O6) - a member of the pyroxene group

Quartzite with inclusions

Metamorphic Rock (Mainly SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Yellow Quartz (Citrine/Yellow Chalcedony)

Silicon Dioxide (SiO2)

Smoky Quartz (with inclusions)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz / Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Pyrite

Iron Sulfide (FeS2)