Organic (Paper And Cellulose)

Botryoidal Chalcedony

Silicon Dioxide (SiO2)

Carnelian Agate

Carnelian (Silicon Dioxide - SiO2)

Turquoise and Hematite

Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Hematite (Fe2O3)

Bauxite

Bauxite (Al2O3·nH2O)

Native Copper (in coinage alloy)

Copper (Cu)

River Rock (Greywacke/Sandstone)

Lithic Wacke

River Pebble (Gravel)

Clastic sedimentary rock (likely Siltstone or Mudstone pebble; SiO2 with various impurities)

Carnelian

Carnelian (a variety of Chalcedony), SiO2 (Silicon Dioxide)

Unakite

Unakite (altered granite)

Blue Sphalerite (likely dyed or treated Druzy Quartz/Agate)

Zinc Sulfide (ZnS) or Silicon Dioxide (SiO2) with trade-name enhancement

Amazonite

Potassium aluminum silicate (KAlSi3O8)

Ruby and Diamond Heart Pendant

Corundum (Al2O3) and Diamond (C)

Rhodonite

(Mn,Fe,Mg,Ca)SiO3

Labradorite

Labradorite ((Ca, Na)(Al, Si)4O8)

Amethyst

Amethyst (Silicon Dioxide - SiO2 with iron impurities)

Yellow Quartz (Citrine or Citrine-colored Quartz)

Silicon Dioxide (SiO2)

Fossilized Shark Tooth (Otodus obliquus)

Otodus obliquus (composed primarily of Fluorapatite)

Quartz Geode (River Cobble)

Silicon Dioxide (SiO2)

Amazonite

K(AlSi3O8) - Microcline (Var. Amazonite)

Amethyst

Amethyst (Silicon Dioxide, SiO2 with Iron impurities)

Chalcedony (Agate/Quartz)

Silicon Dioxide (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Blue Quartz (Dumortierite Quartz)

Silicon Dioxide with Aluminum Borosilicate (SiO2 + AlAl6BSi3O18)

Moonstone

Orthoclase (Potassium Aluminum Silicate), Formula: (K,Na)AlSi3O8

Libyan Desert Glass

Impactite (High-silica tektite)

Pink Granite

Phaneritic Plutonic Felsic Rock (rich in Potassium Feldspar)

Gold Nugget

Native Gold (Au)

Sandstone (Gneissic or Banded)

Clastic Sedimentary Rock (composed predominantly of SiO2)

Mookaite Jasper

Radiolarite (SiO2 with impurities)

Jasper and Quartz River Cobble

Silicon Dioxide (SiO2) with Hematite inclusions

Geode (unopened)

Calcedony-lined Geode (SiO2)

Kimberlite with Diamond

Kimberlite (Porphyritic Peridotite)

Tiger's Eye

Tiger's Eye (Pseudomorph of Quartz after Crocidolite), SiO2

Emerald

Beryl (Be3Al2(SiO3)6) with Chromium and/or Vanadium impurities

Amethyst

Silicon Dioxide (SiO2) with trace Iron (Fe)

Green Jasper

Silicon Dioxide (SiO2) with impurities

Turquoise

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

River Rock (likely Quartzite or Quartz-rich Siltstone)

Quartzite (SiO2)

Quartzite Pebble

Quartzite (primarily SiO2)

Healer's Gold (Pyrite/Magnetite in Serpentine)

Magnetite (Fe3O4) and Pyrite (FeS2) in Lizardite/Antigorite [Mg3Si2O5(OH)4]

Limestone (specifically Grainstone or Micrite)

Calcium Carbonate (CaCO3)

Limonite

Limonite (FeOO·nH2O)