Mixed (Igneous, Sedimentary, Metamorphic, And Minerals)

Rough Emerald (Beryl)

Emerald (Be3Al2(SiO3)6 with Cr/V impurities)

Amazonite

KAlSi3O8 (Potassium Feldspar, variety of Microcline)

Muscovite Schist

Muscovite Mica Schist (KAl2(AlSi3O10)(OH)2)

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Pyrite in Quartz

Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (specifically Citrine or Yellow Quartzite pebble)

Silicon Dioxide (SiO2)

Tumbled Moonstone and Amazonite Chips

Orthoclase (KAlSi3O8) and Microcline (KAlSi3O8) of the Feldspar Group

Clear Quartz (Tumbled)

Quartz (Silicon Dioxide - SiO2)

Citrine Quartz

Citrine (Silicon Dioxide, SiO2)

Citrine Geode Fragment

Citrine (Silicon Dioxide with Iron Impurities), SiO2

Olivine

Olivine group (Mg, Fe)2SiO4

Quartz (Milky/Crystalline)

Silicon Dioxide (SiO2)

Kimberlite with Diamond

Kimberlite (Diamond formula: C)

Diorite (Polished River Pebble)

Diorite (Intermediate intrusive igneous rock)

Pyrite

Iron Sulfide (FeS2)

Hematite (Iron Ore)

Hematite (Fe2O3)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within metamorphic/igneous matrix

Pink Granite

Felsic intrusive igneous rock

Diorite

Diorite (an intrusive igneous rock)

Amethyst

Silicon Dioxide with Iron impurities (SiO2)

Ruby

Corundum (Al2O3 with Chromium traces)

Citrine

Citrine (Silicon Dioxide, SiO2)

Sodalite

Na8(Al6Si6O24)Cl2 (Sodalite)

Ruby

Corundum (Al2O3:Cr)

Ruby

Corundum (Aluminum Oxide with Chromium traces), Al2O3:Cr

Milky Quartz

Silicon Dioxide (SiO2)

Amethyst (Chevron or Banded Amethyst)

Silicon Dioxide (SiO2) with iron impurities

Red Garnet

Pyrope-Almandine series (Mg3Al2(SiO4)3 to Fe3Al2(SiO4)3)

Smoky Quartz (Vein Quartz)

Quartz (Silicon Dioxide, SiO2)

Diamond in Kimberlite

Diamond in Kimberlite Matrix (Diamond: C, Kimberlite: complex Potassic Peridotite)

Geode (Unopened)

Siliceous Septarian Concretion / Geode (SiO2)

Blue Quartzite (River Pebble)

Quartzite (primarily SiO2 with Dumortierite or Crocidolite inclusions)

Hematite

Iron(III) oxide (Fe2O3)

Chalcedony (Grey/White Agate)

Silicon Dioxide (SiO₂)

Pyrite (on Quartz matrix)

Iron Disulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Fluorite (Green Fluorite)

Calcium Fluoride (CaF2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Granite

Granite (felsic intrusive igneous rock)

Limonite with Trace Fossils

Hydrous Iron Oxide Mixture (FeO(OH)·nH2O)